How big of a fuel tank is usually installed on this size of bipe. I have the Magnum 120 4C. The fuselage has lots of room, but I am not sure how big I should go. I'm also looking at installing a canopy instead of an open cockpit. I think a 4 Star 60 canopy may work. I guess it will hard to tell what this bipe started out as, with all of the modifications. Oh well! I already have my next bipe spyed out. I I just bought a set of plans from a club member for a Standard Lazy Ace (76"wingspan). Oh boy?!