A while ago I created this concept to make a bass drum similar to the Roland because the small sizes available where not cutting it. Needless to say I never did make it, (work [military] and life) got in the way, I ended up buying a Roland TD 11 kit, I have that set but I also still have my converted acoustic set, I am combining both using the Roland module and either an Alesis I/O or an Alesis DM5, using the DM5 will allow me to have all module sounds from both modules and not be depending on software, not as good sounding but pretty safe for a live situation. both modules sounds will be merged with a small mixer, and the midi part will be merged using a midi merger. I will post video of the whole project once I return from deployment... :-
More videos of my crappy playing here:
https://www.youtube.com/channel/UC9kuzSVwJpKjUrPXwF-BJdAVideo of the TD11 with extra cymbals here:
https://www.youtube.com/watch?v=Dyn8CmQ8M1MIn the meantime here is the concept for those interested:
http://www.instructables.com/id/Electronic-Bass-Drum-Concept/