ORIGINAL: carlcorn

I owned an older version of the TF P-51 Gold Edition kits in the mid 90s. It was build very similar to yours and flew great on a 2cycle OS 61 SF. This engine was a bit nicer than the FP series engines because it had higher compression and ball bearing supporting the crank shaft. It did not have the unlimited verticle many pilots expect today but held it's own and flew well. That plane also flew well from grass without an issue. This plane was also my first attempt with a glass finish. This probably added a bit to the weight. I rember it being just under 10 lbs.

Bottom line the 75 should fly it. The 120 should provide excellent performance.

Ironically I have a TF P-51 Gold edition partially set up in my basement. It is mostly complete and waiting for the Sato 1.15. All that's left is to cmomplete the engine break in, cut and mount the openings in the cowl, and some details such as the canopy, pilot, and final balance check...