When I can, I'll rig it from both ends to try and keep it balanced. Sometimes you have to repick it a couple times to get it rotated and balanced right so the flanges line up going back on. One time I even used a forklift on a 1280 and that worked out pretty well. I'll have to try the floor/tranny jack method you guys mentioned. Sounds like it works pretty well.
How do you guys hold the gaskets in place? Two methods I have used are spray adhesive and using very fine strands of wire, like single strands from SO cord, looped through the bolt holes. It allows enough room to start a couple bolts, then slip the wire out. I've only done one economizer with the new style flanges and gaskets on a machine that leaked at startup. I'd have to say it's a big improvement over the rubber gaskets.
