Serious garden shed boffinry there.
Looking at the specs, they want to hit their target with a 60 second burn time and some serious acceleration and even more serious deceleration.
I wish them well and good health but I think I'd rather watch this one (including the fueling) from a bunker. Having been around N2O, it can be a bit tricky and lot nasty and when the crap hits the fan, all bets are off.