chemie, The 55 got 4 oz run through it tonight. Has a light pinch at the top and used a heat gun to loosen it up before starting. Had the main way too rich. Got it leaned out to slightly rich of peak. Fuel had a bit of caster added. APC 11x5 on 10% hitting 12400 rpm slightly rich.

Idle was good. I don't like to let a new ABC idle too much, other wise the pinch will come back as the engine cools and grab the piston causing it to stop.

I pulled the Saito 45 and mount. Will get the engine mounted up tomorrow and hopefully give you a flight report on Wednesday. This combo weighs about 3 oz more which should put the plane a hair under 5 lbs. This will be mounted inverted.

As far as too much power for this plane- if it doesn't come with a weight penalty and fly heavy, the more the better. The ST51 rocked the 4* and I am expecting that and maybe a bit more. I already suspect that after it gets broken in, My other Saito 45 will get the job to get it dialed in. The 4* flies so nice on the wing. I hope to have a twin with the Saito's in the air next year.

Gray Beard, I already like the looks of the "sore thumb". Do give a few shots when complete.