Thanks for replies. So now I have the size of the Alpha40 trainer prop more or less confirmed I guess: it's something around a 10x4. The Evo trainer prop that I ordered is 10.5x4 and I wanted to check if in fact I'm getting the same thing that is intended for the Alpha40 as a trainer prop.

Thanks for the feedback about flight training with this prop. I've had some indecision about whether I should use it even just initially.

The question I still have is about using the Evo trainer prop with my more powerful TT pro 46. From what I understand, I'll just tune it to run a bit richer than usual and use the tachometer to make sure that my TT pro is tuned so that it does not over rev above it's rated max rpm (because of the low pitch). Is that all I need to worry about? After my first few flights I'll change to 11x5 or 11x6 (I have a 10x7 also).

Or would the Evo trainer prop be just not good for a TT pro 46 even temporarily?

Thanks guys