RE: Cermark Spitfire
No way a 18-10 is too much prop for a 26. Try a 16-8 apc. I have one on mine with a g26 and it turns it 9200 rpm. Mine flies great. I like the way it flies so much I upgraded the retracts with robarts and struts and 3.5 robart wheels. Just try a 16-8 apc and you can compare the rpm and if it anywhere close it should fly great.
Good Luck
Nelson