well i did the dia-plate mod and still no workie[:'(]i even took the plane off with out the cowl on! same ole thing,runs like a champ on the ground but as soon as you put some speed and alltitude in, it richens upone thing i can say is i'm getting good at takeoff at stall speed and doing a circut and landing last thing i try is the velocity stack but i can'nt see that helping,but who knows at this point i'll try anything! anymore ideas? maybe my engine is just a turd!