I acquired a b7100 tractor and bought a k600 backhoe. I know the b7100 takes a different model but I'm hoping to use the one I have due to hoq rare they aeem to be. I'm curious about the subframe, obviously they aren't a dime a dozen anymore and fabricating one is going to be my only option. Is there a manual someone could point me to to see what it looks like and where it bolts on the tractor?