SeamusG,
Pete and I like to build. The more the merrier, as fas as I'm concerned. Pick a spot and claim it!! If you wanna build a 4*60 then do it. I won't stop you buddy. But the 120 flies better.
You're just about ready to try a small gasser and the 120 is about the best plane in the world for a lazy sunday morning or boring holes in the sky. Take your pick. And having a nice little gasser on the nose means you can locate the tank closer to the CG and fly it for about 35 cents a flight. Glow powered, it will cost $4 per flight and it'll be nose heavy for the first 1/2 of the flight because you have to mount the 20oz tank as close the firewall as humanly possibly.
But I'm not twisting your arm or anything.