I had 9, yes 9 2" tee's to work with and managed to incorperate 4 of them.

Bought them for a special deal so I had alot to work with the after a few hours of tinkering with the design I came up with that.
I have about 50 spudgun related video's I've taken myself so I just got all the one relevant to this gun(SGA) and put them in windows movie maker, didn't really care what order they were in.
Near the end of the video when its clear it was my first shot at the table thing with a golfball there was other hole in it slightly larger to the right which was from a potato.
Edit: Update pictures of the piston pilot setup.