I dont think breaking in an engine on a stand is the way to go but, I generally test fire them, put a little time on them, enough to bring it up to temp and then fly it. The stand shown works better than anything else I have seen. Nothing has moved it yet and its had a dozen or so 150's mounted on it. Make something that looks like this and you'll be good to go. Its 3/4 plywood, cost me $22.00 to make