I'm going to look for some 6,5x6,5 Graupner props, but I like to compare some setups with each other. I hear Stiletto owners are quite satisfied with the performance of the 7*6w from APC. APC is still plastic, and with that amount of RPM's I like to go for carbon props. The Club20 guys here (same persons that make the MB40 engines) are making their own carbon props in moulds. When I meet them, I'll ask about the possibilities and measurements of the props. The carburetor is for the braking in of the engine, I will use a venturi while flying eventually.

The TruTurn spinners arrived today! They ended up quite expensive. Dutch customs added an extra fee of €20 euros to the whole package. I think they cost about €50,- euros per spinner right now. [] And they don't even fit! The crankshaft thread of the Rossi is 6.15mm (almost 1/4" ), and the TruTurn hubs have metric M6 thread which is causing problems. It is impossible to screw it together, so the spinner isn't going to fit. Even the aluminum bushing that came with the spinner is perfectly 6.0mm, so that is also a problem because it doesn't slide over the crankshaft threads. Maybe it's possible to modify the bushing untill it fits, but that doesn't solve the adapter-problem.

Maybe it's possible to get an unprocessed adapter from TruTurn and send them over to Rossi, so they can custom drill and tap the right thread?

Hits and tips are very welcome right now.