I wasn't going to cut the shaft my self I was going to ask my brother to do that. I like my ten fingers to much. And to thread it I'll take it to a machine shop. I sent a email to Lambert rc asking them if they have a prop adapter and I'm waiting for them to respond. Your right about the cost of this plane vs a glow equivalent. A glow would cost about $500 and a the spad is about $300.
As for the propeller. Since this is going on a 1/5 scale cub I'll go with a 18x6
Thanks
-sam: cool: