943's were ok, I had one, big & slow, slow as a 970 series, but not as strong. Both the 970 series, and the 943's had servo driven hydrostats. I hated those, they had like a delayed reaction in the steering, you could move the control levers, a second later they would move. It was supposed to be like power steering, but I am no fan. The 963 machines were better, never had one, but they were supposed to have straight steering controls. The 963 had a standard quick attach, unlike the 943, which was a family of it's own. The 970 series also had a quick attach of their own, those that had one.