A buddy of mine and I just converted two of these engines using the Jag parts and they turned out wonderful. The only thing that was complicated was the facing off of the flywheel to lighten it. Since my friend has machining skills and the equipment it was not to bad. He faced off the front of the flywheel and then he removed all of the cooling fins. It really lightened the engine up well. The Jag cast engine mount was very nice as was the round cast aluminum muffler that they make for this engine. One of the engines was a short shaft and the other is a long shaft. It was equally easy to convert both engines. They are both mounted in a Hangar 9 PT-19. We ran my engine about a week ago. It wouldn't start by hand but fired right up with the electric starter. It turned a Master Airscrew 16x8 classic at 7400 rpms and idled all the way down to 1200 rpm easily. I'll let you know how the flights go soon. It ended up costing about $85 for the parts to convert it. Considering I was given the engine it has turned into a real bargain. Jags website shows the engine mounted in the Dynaflite Chipmunk if you care to see it. Later, Maximus