I'm just doing a test project right now, to try and get DSP working. It's nothing special; I have 3 script nodes, each which just prints out a string to the console. I wanted to implement another custom one (a DSP) that does something similar, just as a proof-of-concept, just to see how it's done. I'm using the old Eclipse BPMN editor (not the new one, which I couldn't get to work).