RE: Sig Rascal 110
From the folks I fly with that have the 110, say the 180 is on the high edge of the engine scale. The idle on the 180 with a prop it likes can be fast than the landing speed for the Rascal. You have to force it to the ground to get down. And if there's a headwind, you have real chore and hope that one wing doesn't rise and get a crosswind effect. I seen some "hurt" that way. A 120 4 stroke is probably more than enough power for good flying qualities.
JMHO.
Ray