Brian, I looked into the prop nut solution. Dubro maks some the right size but unless I need the added weight for balance they are overkill.

You will not believe what happened today. We went in to Spokane to buy out a Home Depot, so I stopped by my LHS. Bingo, 1 inch plastic spinners for electric applications. The owner said they came from Hobby Lobby (who knew?). I almost chocked on the price, $ 5.49 each for a gram of cast plastic. Well, anyway, that problem is solved.

Thanks to all who helped with this. I now have 2 of the hundred or so parts for this plane, heck it is starting to come together.

One more thing. One of the great things about building a house for ones wife is that if you buy a lot of stuff at H.D. to finish the guest bathroom, she pays the toll and never questions why you need a new Ryobi scroll saw for the job. Let the balsa dust fly. HAHAHAHAHAHA