Yep. Ace made the nice lightweight 5:1 (or was it 5.5:1?) ratio nosecones for 4" tubing. At the time, PML and LOC were making shorter nosecones that just didn't look right for most of the rockets I was building, plus the ACE cones were cheaper. I have several of them on my HPR rockets, but I don't have any unused ones left.

Korey Kline founded the company in the latter 70's, IIRC. He later formed Hypertek which makes hybrids.

If any of you read Rosinfield's Launch article, he conviently left out the fact that a Hypertek system was the first commercial hobby hybrid flown, not as a beta or a demo, but by a paying customer. Both Aerotech and Hypertek were at the Manchester field that day flying demos. I can't remember who bought the motor and flew it, but I think I still have a video tape of it somewhere. I can't remember which launch it was, but I think it was "Spears 2" when Lamothe fried another rocket with a "dragon's breath" motor.