Spyder Mr2

I just recently bought this spyder mr2 and the first couple shots i made didn't impress me, every ball curved and i had several chops that followed up into the hopper destroying my paint. I did put a 16 inch barrel on it and it did a little better but every 3-5 shots one chopped and went up into the hopper. The balls still curved really bad sometimes they would only go 20 feet before they would go completely of course. Only every 5th shot i made would go straight. I stopped using it and started using my cheap tl-r, at least that one didn't chop. I would still like to use the mr2 if there's anyway to fix this problem, or ill sell it for a portion of what i bought it for. Any suggestions on ways to fix this problem for a small price or if not, any guns i could buy that would be good for the profit that i would make from the sale from the mr2