Gudmund,

I have been using one of John's chutes for about 5 months now on a BVM F-4 there is a very specific way to pack the chute so that it deploys everytime. You should also seriously consider a way to "blow" the chute should it accidentally deploy in the air. Once John comes up with the slotted chute I will defeintely have to have one for my F-100.

BTW you might want to consider a plunger with a spring attached to the back of it for deploying the chute.