Regarding the 45 6001, yes, I know there were two. I have the second one, a TV (forgot to mention all mine are TV engines). Some day I'll get it back on the test stand and see what it does with a 13x4 prop. Mine is slated for a VK Fokker Dr.I and I'll want the greatest diameter I can get. Not too concerned about power since I'm building it light and I want to approximate scale flight as well as I can.
Interesting comment about using wood props on the .09.
Jim