I think your project came out great and looks good. With a tractor that size, I think your design is strong enough. If you had situations where the terrrain could cause a complete rollover, or multilple spins then I'd be more concerned. I, as I'm sure most of us avoid them as much as we can. My biggest concern would be when you go to sell the tractor. In this "sue happy" world we're in, some knucklehead could do something stupid and sue you for modifying the ROPS and some dealers won't touch stuff where the ROPS has been modified for that very reason. Even if your design is stronger than stock, the data doesn't exist to back it up. Kind of one of those Dilbert situations. Anyway. I think it looks great.