Hey there fellow flyers ,gotta few ?'s for ya. I've got a magnum .30 4* on a tequila .25 and the only way to keep her in the air is at 3/4 to full power,and it still lags

Are these engines typically this slow on a 9x5? This engine is definatly not for the tequila!!
My main question is this- Would my magnum be a good choice for the skycutter .20 (from flyingthingz.com) or would it still be a dog on this too

does anyboddy have experiance with the skycuter .20??
What plane would be a good choice for this engine?---I'm turning about 9800 to 10,200 rpm with a 9x5 wood prop.
thanx guys!!