I just got mine together, and i am putting standard torque futaba servos.  I have the choice between the magnum .40 2 stroke or the thunder tiger .46 2s stroke.  anyone have any suggestions on the engine choice?  seeing i have a little bit of weight with the servos does anyone know the weight with muffler of the two engines and the power to weight ratio for each? another question i have is that i have a prop i think will work but it doesn't say the pitch on it, anyone know how to measure this? Thanks so much! John