Hi Max,
I have no idea how you can get some of them off with just a 3 jaw puller, a couple I have not been able to move even with the 6 ton jack pulling on them. One I distinctly remember id the GXV 160 I ended up putting on the split bodied Tornado, mate wanted it put on an Ariens but I couldn't move the boss so I suggested to him that I build the wide body one, which he loves