Before someone tells you to read the existing thread I'll tell you that the OS 91 is a good match .The thrust angle wasn't an issue for me , I like the APC 15x4W prop, the CG won't be a problem. I fly off a asphalt runway and never had a problem with the gear mount. It might be more of a concern flying off a grass surface. It wouldn't be a bad idea to beef it up but because I haven't done it I can't offer any advice

Good luck