I have one with an OS Gemini 120 twin, and wonder what APC prop to use to allow for 3D performance. What is more important, pitch, or blade width? I have flown the plane once to check it out, but the glue joints were fragile, so I didn't do anything stressful with it, but it flew fairly well, don't recall what prop it has now, but pretty sure I need to grab a couple spares as I don't think I have any for this engine.