Dan,

Let me suggest that you stick with the .19 on the Senorita. I am flying mine with an O.S. .26 4-stroke which is probably pretty close to a .19 2-stroke in power output.

This is a plane that you "fly on the wing", which means you really don't want to go up too much in power. On these if you try to speed up the plane you have the effect of a flat bottom wing that changes trim as you change speed.

Just my 2 cents worth.

Take care,