It does handle the 12x7 just fine, but I'm thinking the 12x6 is a better fit for this engine. This engine is in a pattern plane and I'm going for more of a "4 stroke" power band, which is why I'm running the bigger props.

P.S. - O.S. recommends a 13x6 on the high end, this has got to bog the engine down. My tower .75 only turns like 12,000 on a 13x6 (when I can get it to run).