diff --git a/.ci/nightly/JenkinsfileNexusScan b/.ci/nightly/JenkinsfileNexusScan
deleted file mode 100644
index e2d589a..0000000
--- a/.ci/nightly/JenkinsfileNexusScan
+++ /dev/null
@@ -1,5 +0,0 @@
-@Library('corda-shared-build-pipeline-steps@5.0') _
-
-cordaNexusScanPipeline(
-    nexusAppId: 'com.corda.CSDE-Java.5.0'
-)
diff --git a/buildSrc/src/main/groovy/csde.gradle b/buildSrc/src/main/groovy/csde.gradle
index a94ffa9..f9e32e5 100644
--- a/buildSrc/src/main/groovy/csde.gradle
+++ b/buildSrc/src/main/groovy/csde.gradle
@@ -56,8 +56,6 @@ dependencies {
             extension = 'cpb'
         }
     }
-
-    implementation "org.codehaus.groovy:groovy-json:3.0.9"
 }
 
 // task groupings
@@ -85,7 +83,7 @@ def workflowBuildDir = rootDir.toString() + "/workflows/build"
 
 
 // todo: Need to read things from cordapp plugin - the cordapp names will be changed by the user
-def appCpiName =  'cpi name'
+def appCpiName =  'cpi name' // !!! this must match with the cpi name in /config/static-network-config.json
 def notaryCpiName =  'CSDE Notary Server CPI'
 
 
@@ -148,6 +146,19 @@ tasks.register("stopCorda") {
     }
 }
 
+tasks.register("stopAndCleanCorda") {
+    group = cordaGroup
+    dependsOn('clean')
+    doLast {
+        try {
+            cordaLifeCycle.stopCorda()
+        } catch (Exception ignore) {
+            println("ignoring exception: ${ignore.toString()}")
+        }
+        delete devEnvWorkspace
+    }
+}
+
 tasks.register("getPostgresJDBC") {
     group = supportingGroup
     doLast {
diff --git a/buildSrc/src/main/java/com/r3/csde/CordaLifeCycleHelper.java b/buildSrc/src/main/java/com/r3/csde/CordaLifeCycleHelper.java
index daa78a6..c76382f 100644
--- a/buildSrc/src/main/java/com/r3/csde/CordaLifeCycleHelper.java
+++ b/buildSrc/src/main/java/com/r3/csde/CordaLifeCycleHelper.java
@@ -23,8 +23,12 @@ public class CordaLifeCycleHelper {
         Unirest.config().verifySsl(false);
     }
 
-    public void startCorda() throws IOException {
-        PrintStream pidStore = new PrintStream(new FileOutputStream(pc.cordaPidCache));
+    public void startCorda() throws IOException, CsdeException {
+        File cordaPIDFile = new File(pc.cordaPidCache);
+        if (cordaPIDFile.exists()) {
+            throw new CsdeException("Cannot start the Combined worker. Cached process ID file " + cordaPIDFile + " existing. Was the combined worker already started?");
+        }
+        PrintStream pidStore = new PrintStream(new FileOutputStream(cordaPIDFile));
         File combinedWorkerJar = pc.project.getConfigurations().getByName("combinedWorker").getSingleFile();
 
         // Manual version of the command to start postgres (for reference):
@@ -87,7 +91,7 @@ public class CordaLifeCycleHelper {
             cordaPIDFile.delete();
         }
         else {
-            throw new CsdeException("Cannot stop the Combined worker\nCached process ID file " + pc.cordaPidCache + " missing.\nWas the combined worker not started?");
+            throw new CsdeException("Cannot stop the Combined worker. Cached process ID file " + pc.cordaPidCache + " missing. Was the combined worker not started?");
         }
     }
 }
diff --git a/buildSrc/src/main/java/com/r3/csde/CordaStatusQueries.java b/buildSrc/src/main/java/com/r3/csde/CordaStatusQueries.java
index 95072ba..38bf834 100644
--- a/buildSrc/src/main/java/com/r3/csde/CordaStatusQueries.java
+++ b/buildSrc/src/main/java/com/r3/csde/CordaStatusQueries.java
@@ -1,44 +1,22 @@
 package com.r3.csde;
 
+import kong.unirest.HttpResponse;
 import kong.unirest.JsonNode;
 import kong.unirest.Unirest;
 import kong.unirest.json.JSONArray;
 import kong.unirest.json.JSONObject;
-import kong.unirest.HttpResponse;
+
+import java.util.Arrays;
+import java.util.LinkedList;
+import java.util.List;
 
 // todo: This class needs refactoring, see https://r3-cev.atlassian.net/browse/CORE-11624
 public class CordaStatusQueries {
 
     ProjectContext pc;
-    public CordaStatusQueries(ProjectContext _pc){ pc = _pc; }
 
-
-    public HttpResponse<JsonNode> getVNodeInfo() {
-        Unirest.config().verifySsl(false);
-        return Unirest.get(pc.baseURL + "/api/v1/virtualnode/")
-                .basicAuth(pc.rpcUser, pc.rpcPasswd)
-                .asJson();
-    }
-    public void listVNodesVerbose() {
-        HttpResponse<JsonNode> vnodeResponse = getVNodeInfo();
-        pc.out.println("VNodes:\n" + vnodeResponse.getBody().toPrettyString());
-    }
-
-    // X500Name, shorthash, cpiname
-    public void listVNodes() {
-        HttpResponse<JsonNode> vnodeResponse = getVNodeInfo();
-
-        JSONArray virtualNodesJson = (JSONArray) vnodeResponse.getBody().getObject().get("virtualNodes");
-        pc.out.println("X500 Name\tHolding identity short hash\tCPI Name");
-        for(Object o: virtualNodesJson){
-            if(o instanceof JSONObject) {
-                JSONObject idObj = ((JSONObject) o).getJSONObject("holdingIdentity");
-                JSONObject cpiObj = ((JSONObject) o).getJSONObject("cpiIdentifier");
-                pc.out.print("\"" + idObj.get("x500Name") + "\"");
-                pc.out.print("\t\"" + idObj.get("shortHash") + "\"");
-                pc.out.println("\t\"" + cpiObj.get("cpiName") + "\"");
-            }
-        }
+    public CordaStatusQueries(ProjectContext _pc) {
+        pc = _pc;
     }
 
     public HttpResponse<JsonNode> getCpiInfo() {
@@ -48,17 +26,92 @@ public class CordaStatusQueries {
                 .asJson();
     }
 
-    public void listCPIs() {
-        HttpResponse<JsonNode> cpiResponse  = getCpiInfo();
-        JSONArray jArray = (JSONArray) cpiResponse.getBody().getObject().get("cpis");
-
-        for(Object o: jArray){
-            if(o instanceof JSONObject) {
-                JSONObject idObj = ((JSONObject) o).getJSONObject("id");
-                pc.out.print("cpiName=" + idObj.get("cpiName"));
-                pc.out.println(", cpiVersion=" + idObj.get("cpiVersion"));
-            }
-        }
+    public HttpResponse<JsonNode> getVNodeInfo() {
+        Unirest.config().verifySsl(false);
+        return Unirest.get(pc.baseURL + "/api/v1/virtualnode/")
+                .basicAuth(pc.rpcUser, pc.rpcPasswd)
+                .asJson();
     }
 
+    // cpiName, cpiVersion
+    public void listCPIs() {
+        HttpResponse<JsonNode> cpiResponse = getCpiInfo();
+
+        JSONArray cpisJson = (JSONArray) cpiResponse.getBody().getObject().get("cpis");
+
+        List<List<String>> lines = new LinkedList<>();
+        for (Object o : cpisJson) {
+            if (o instanceof JSONObject) {
+                JSONObject idObj = ((JSONObject) o).getJSONObject("id");
+                String cpiName = idObj.get("cpiName").toString();
+                String cpiVersion = idObj.get("cpiVersion").toString();
+
+                lines.add(Arrays.asList(cpiName, cpiVersion));
+            }
+        }
+        List<String> title = Arrays.asList("CPI Name", "CPI Version");
+        List<Integer> titleSizes = Arrays.asList(40, 20);
+        printTable(titleSizes, title, lines);
+    }
+
+    public void listVNodesVerbose() {
+        HttpResponse<JsonNode> vnodeResponse = getVNodeInfo();
+        pc.out.println("VNodes:\n" + vnodeResponse.getBody().toPrettyString());
+    }
+
+    // x500Name, shortHash, cpiName
+    public void listVNodes() {
+        HttpResponse<JsonNode> vnodeResponse = getVNodeInfo();
+
+        JSONArray virtualNodesJson = (JSONArray) vnodeResponse.getBody().getObject().get("virtualNodes");
+
+        List<List<String>> lines = new LinkedList<>();
+        for (Object o : virtualNodesJson) {
+            if (o instanceof JSONObject) {
+                JSONObject idObj = ((JSONObject) o).getJSONObject("holdingIdentity");
+                String x500Name = idObj.get("x500Name").toString();
+                String shortHash = idObj.get("shortHash").toString();
+
+                JSONObject cpiObj = ((JSONObject) o).getJSONObject("cpiIdentifier");
+                String cpiName = cpiObj.get("cpiName").toString();
+
+                lines.add(Arrays.asList(x500Name, shortHash, cpiName));
+            }
+        }
+        List<String> title = Arrays.asList("X500 Name", "Holding identity short hash", "CPI Name");
+        List<Integer> titleSizes = Arrays.asList(60, 30, 40);
+        printTable(titleSizes, title, lines);
+    }
+
+    public void printTable(List<Integer> titleSizes, List<String> title, List<List<String>> lines) {
+        int width = titleSizes.stream().reduce(0, Integer::sum);
+        String separator = "-".repeat(width + 1);
+        pc.out.println(separator);
+        pc.out.println(formatLine(titleSizes, title));
+        pc.out.println(separator);
+        for (List<String> line : lines) {
+            pc.out.println(formatLine(titleSizes, line));
+        }
+        pc.out.println(separator);
+    }
+
+    public String formatLine(List<Integer> titleSizes, List<String> line) {
+        StringBuilder sb = new StringBuilder();
+        int delta = 0;
+        for (int i = 0; i < titleSizes.size(); i++) {
+            String s = line.get(i);
+            sb.append("| ").append(s);
+            delta += titleSizes.get(i) - (2 + s.length());
+
+            if (delta > 0) {
+                sb.append(" ".repeat(delta));
+                delta = 0;
+            } else {
+                sb.append(" ");
+                delta -= 1;
+            }
+        }
+        sb.append("|");
+        return sb.toString();
+    }
 }