Using a 72" finish mower with a 5600 Toolcat. Mowing irregular terrain with a lot of roots. Problem is that I keep bending the wheels and wheel yolks (I've gone thru 4 and am being as careful as I can). Anybody encountered this problem? If so, any solution? Bobcat does not make a beefier wheel and yolk. Anybody know of an aftermarket source for something beefier?