Both drummers I play with use in ear or flashing metronome s , they were some of the first drummers I heard able to play electronic type beats, crazy fast. Sync is definitely important .
That thing looks homemade, but we'll done, I was going to run it thru native instruments a absynth or massive, but I like the idea of using it for one shots and loop triggers.
Maybe I can set ip up with led and use it like the ableton square contolller, the black keys would be the horisontal I guess.
I wanted to put midi trigger pads In my bass where I can thump them a with my thumb for years now. A few wires wrapped around my 1/4" cable plus that should do it.