diff --git a/molstar-extension/src/extensions/volumes-and-segmentations/entry-root.ts b/molstar-extension/src/extensions/volumes-and-segmentations/entry-root.ts
index 3b1f8f56..314dd67e 100644
--- a/molstar-extension/src/extensions/volumes-and-segmentations/entry-root.ts
+++ b/molstar-extension/src/extensions/volumes-and-segmentations/entry-root.ts
@@ -71,7 +71,7 @@ function entryParam(entries: string[] = []) {
         customEntryId: ParamDefinition.Text('', { hideIf: p => p.entryId !== '__custom__', description: 'Entry identifier, including the source prefix, e.g. "emd-1832"' }),
     }, { isFlat: true });
 }
-type LoadVolsegParamValues = ParamDefinition.Values<ReturnType<typeof createLoadVolsegParams>>;
+export type LoadVolsegParamValues = ParamDefinition.Values<ReturnType<typeof createLoadVolsegParams>>;
 type RawDataKind = 'volume' | 'segmentation' | 'mesh' | 'primitive';
 
 export function createVolsegEntryParams(plugin?: PluginContext) {
diff --git a/molstar-extension/src/extensions/volumes-and-segmentations/index.ts b/molstar-extension/src/extensions/volumes-and-segmentations/index.ts
index 82f1b13e..36ed0ea5 100644
--- a/molstar-extension/src/extensions/volumes-and-segmentations/index.ts
+++ b/molstar-extension/src/extensions/volumes-and-segmentations/index.ts
@@ -12,13 +12,13 @@ import { PluginContext } from 'molstar/lib/mol-plugin/context';
 import { StateAction } from 'molstar/lib/mol-state';
 import { Task } from 'molstar/lib/mol-task';
 import { DEFAULT_VOLSEG_SERVER, VolumeApiV2 } from './volseg-api/api';
-import { GEOMETRIC_SEGMENTATION_NODE_TAG, MESH_SEGMENTATION_NODE_TAG, LATTICE_SEGMENTATION_NODE_TAG, VOLUME_NODE_TAG, VolsegEntryData, VolsegEntryParamValues, createLoadVolsegParams } from './entry-root';
+import { GEOMETRIC_SEGMENTATION_NODE_TAG, MESH_SEGMENTATION_NODE_TAG, LATTICE_SEGMENTATION_NODE_TAG, VOLUME_NODE_TAG, VolsegEntryData, VolsegEntryParamValues, createLoadVolsegParams, VolsegEntry, LoadVolsegParamValues } from './entry-root';
 import { VolsegGlobalState } from './global-state';
-import { createEntryId } from './helpers';
+import { createEntryId, isDefined } from './helpers';
 import { ProjectGeometricSegmentationData, ProjectGeometricSegmentationDataParamsValues, ProjectMeshData, ProjectMeshSegmentationDataParamsValues, ProjectSegmentationData, ProjectLatticeSegmentationDataParamsValues, ProjectVolumeData, VolsegEntryFromRoot, VolsegGlobalStateFromRoot, VolsegStateFromEntry } from './transformers';
 import { VolsegUI } from './ui';
 import { createSegmentKey, getSegmentLabelsFromDescriptions } from './volseg-api/utils';
-import { actionShowSegments } from '../../common';
+import { Source, actionShowSegments, findNodesByRef } from '../../common';
 
 // const DEBUGGING = typeof window !== 'undefined' ? window?.location?.hostname === 'localhost' || '127.0.0.1' : false;
 const DEBUGGING = typeof window !== 'undefined' ? window?.location?.hostname === 'localhost' : false;
@@ -69,6 +69,36 @@ export const Volseg = PluginBehavior.create<{ autoAttach: boolean, showTooltip:
 });
 
 
+export async function findOrCreateVolsegEntry(entryId: string, source: string, plugin: PluginContext) {
+    const nodes = plugin.state.data.selectQ(q => q.ofType(VolsegEntry)).map(cell => cell?.obj).filter(isDefined);
+    const targetNode = nodes.find(n => n.data.entryId === entryId && n.data.source === source);
+    debugger;
+    if (targetNode) {
+        // TODO: return selector?
+        // return targetNode;
+        const n = findNodesByRef(plugin, targetNode.data.ref);
+        const nn = findNodesByRef(plugin, n.transform.ref);
+        console.log(nn);
+        debugger;
+        return nn;
+    }
+    else {
+        const entryParams = {
+            serverUrl: plugin?.config.get(VolsegVolumeServerConfig.DefaultServer) ?? DEFAULT_VOLSEG_SERVER,
+            source: source as Source,
+            entryId: entryId
+        };
+        // const entryParams: LoadVolsegParamValues = {
+        //     serverUrl: defaultVolumeServer,
+        //     source: SourceChoice.PDSelect(),
+        //     entryId: ParamDefinition.Text('emd-1832', { description: 'Entry identifier, including the source prefix, e.g. "emd-1832"' }),
+        // };
+        debugger;
+        const entryNode = await plugin.state.data.build().toRoot().apply(VolsegEntryFromRoot, entryParams).commit();
+        return entryNode;
+    }
+}
+
 export const LoadVolseg = StateAction.build({
     display: { name: 'Load Volume & Segmentation' },
     from: SO.Root,
@@ -93,7 +123,6 @@ export const LoadVolseg = StateAction.build({
         if (!globalStateNode) {
             await state.build().toRoot().apply(VolsegGlobalStateFromRoot, {}, { state: { isGhost: !DEBUGGING } }).commit();
         }
-
         const entryNode = await state.build().toRoot().apply(VolsegEntryFromRoot, entryParams).commit();
         await state.build().to(entryNode).apply(VolsegStateFromEntry, {}, { state: { isGhost: !DEBUGGING } }).commit();
         if (entryNode.data) {
@@ -114,7 +143,8 @@ export const LoadVolseg = StateAction.build({
                     if (result) {
                         const isovalue = result.isovalue.kind === 'relative' ? result.isovalue.relativeValue : result.isovalue.absoluteValue;
                         updatedChannelsData.push(
-                            { channelId: result.channelId, volumeIsovalueKind: result.isovalue.kind, volumeIsovalueValue: isovalue, volumeType: result.volumeType, volumeOpacity: result.opacity,
+                            {
+                                channelId: result.channelId, volumeIsovalueKind: result.isovalue.kind, volumeIsovalueValue: isovalue, volumeType: result.volumeType, volumeOpacity: result.opacity,
                                 label: result.label,
                                 color: result.color
                             }