I do all of my trans work at my welding bench
and I made up a couple of arms that are welded..
I have a 1/2" hole in the bench so it just bolts
to the bench.. very simple.. I've done 5 518s
on it so far.. plus I have a tool to compress
the OD clutch(about 900* pressure.. I have all
the stuff needed for doing the 518s)