Here are a few pics on my .60 size Big Stick with a Poulan 25cc. Easy fit, and is going to balance pretty easily. I moved the tail servos aft, the tank is moved to the CG. Looks like 5oz lead in the tail will handle it. Converted weight of the engine is 3lbs 3oz. There are 2 similar sticks at my club flying Zenoah 20ccs. The difference between the Poulan and the Zenoah is only 3 oz factoring the ignition and a 2500ma battery for the ignition. The wing loading goes from 15oz to around 20. Not bad. The plane weighs around 8.5 lbs. The plane had been flying an OS 120AX, probably the fastest climbing plane at the club! Got real tired of cleaning oil off red though.