get yourself a GASOLINE powered engine. get like a Funtana 90 and but a Roto 25 gas engine on it. jut think, as you get into bigger planes and bigger glow the faster you will burn the fuel, and they are average of $20 per gallon. so moving to gas you save you a bunch of money in the long run and each flight last longer w/ a smalller tank ( gas engine SIP fuel).

my 2 cents