Very cool!If it works,great!
Two things come to mind....not that it has an awful lot to do with you?
Go to a "pro" indoor range.Ask to see if they'll give you a quick tour of their facility.The reason to say that is 'cause,I did a bunch of display cabmets at an indoor range........their traps and vent system was "enlightening".
Next is a bit esoteric....oh well?Google-foo,"Olympic Running Boar competition".Get past the whole calibre thing(usta be large bore)....its an air rifle discipline now.Computer generated...true random starts/speeds...and watch the guys participating.Its freak'n amazing.