I thought Jim Jarvis made a flight with commercial motors to 130k ft? That's the highest flight made with commercial motors that I know of but I'm just wondering if they is one flight that may be higher.
thanks, for all the replies, but what i was really looking for is not an official record, just the highest flight.
As far as I know, that would be Kip's work bench 2 to around 150K followed by my 3-stager to 130K, and then a couple of others (mine, Neil Anderson) to 118K. Kip's rocket was damaged during the recovery, but the up part was great.