This is brilliant. I've liked a lot of the other fluid plugins for peeing animations, like Mofme and 50shades, but this is probably the best yet. The parameter adjustments are great and create a lot of Timeline possibilities. I've got it set up to spawn via a UIAssist button along with OrificeAligner already :)
Only minor thing is that it'd be great if the stream on/off status was saved when it's saved as a preset so it starts on preset load.
I would look at this the other way : your source plugin should do the triggering. For instance, I was having fun with VAMMoan the other night, adding a trigger in VAMM that sends the command to spray to Fluids works pretty well.
But this is something that would be possible, I'll have to investigate on watching external variables and triggering accordingly.