hey aerobob:
I just op[ened up the top wing on mine & found no cracks but i beefed up the area any way, i am running a g-62 zenoah on mine with a mejzlik 22x12 prop, unlimited vertical, been ringing it out pretty good with no problems, just installed scooby doo pilot, cant wait for club members to see, i also installed tme simple smoke with 24 oz tank on cg, dry weight = 18 lbs, wet = 21 lbs, lot of power with g-62