The PVC pipes make a great stand, but only for assembly. NEVER start the engine with the plane on one of these stands. We had a guy about loose a couple fingers last year because he started the engine on a small stand and the plane lurched forward and the prop did some major damage to his hand.

One of our guys has designed a free standing stand that breaks down for travel and allows for changing the cradle for different planes. It has a long and wide foot print and his flight box acts as balast to keep it on it's feet. I'm not sure I would trust it for one of my 91 four stroke planes though. Aother guy make a PVC stand glued to a big board which he in turn C clamps to our field tables. Both of these work well. We have some steel cradles with a 5 gall bucket of cement for a base. I about pulled one of these over the other day with my O.S. 52 four stroke. If one of the guys handn't grabbed the tail of my plane, it would and gone over for sure. I just use a loop of parachute cord through the slats in our pit tables and loop it over the rudder and elevator to retain the plane when starting it. No fear of it getting loose.

Don