We are happy to help 
, regarding your node development I want to advise you to be careful with depending on implementation details of nodes that you do not control yourself. If at a future date, this code is refactored, your nodes will break. So it might be advisable for you to just copy the classes you need instead of relying on them. The only case where you need to use the classes from the treeensemble plugin are those, where you want to interact with its nodes, for example the port type (the problem you encountered in October).