My $.02, jack up the bike under the oil drain on a piece of wood and levered over on the sidestand. Drop the linkage bolts except the forward most frame mount and pull the whole shock out to adjust it on the bench. It is probably just as difficult and time consuming to do and you won't hurt yourself when the wrench slips off. I can have mine out in under 5 minutes. A helper is nice to have to hold a wrench on the opposite side of the bolts.
The access ports on the frame for the shock bolts just pop out.
And, for the bigger riders, look up my GSXR shock swap thread. Under $50 for full adjustability and rebuild-revalve ability.
http://www.ninjette.org/forums/showthread.php?t=119304