After I learned Rocket Vision went out o' business, matey, I installed a 18mm motor mount so as nay lose it, arrr, and also have positive motor retention. Begad! However, Rocket Vision 'chutes are, arrr, t' put it blunty, ya bilge rat, crap. It didn't open and t' rocket was damaged. Ahoy! I was able t' repair it, though.