I would not suggest using a 10x?? prop with a ball bearing 46. There is high probability of over revving the engine since the 10x?? prop will allow the engine to turn several hundred rpm faster.

Use an 11 x 5, 6, 7 on the trainer. I would suggest a Master Airscrew 11x6 (the black prop) . The MAS props are not as efficient as an APC prop (the grey ones ), but they are a lot more tolerant of prop strikes and other abuses than an APC.

A 11x6 MAS will provide ABOUT the same performance as an 11x5 APC. Once you have learned to fly the trainer switch over to an APC 11x5, 6 or 7 for added performance.