Have you access to a pneumatic spanner, (windy spanner, rattle gun) then this is your fix.
Just did this three days ago on an R65LS, one bolt undid, the other spun the damper rod, allan key socket on bolt in rattle gun, and the inertia of the damper rod allows the bolt to be removed.
I needed to use the windy spanner to do it up again as well, for the same reason, but this meant that I only needed to access the top of the fork to refill it with fork oil.
"If a man empties his purse into his head, no man can take it away from him.
An investment in knowledge always pays the best interest"
'95 Sport 1100 Guzzi,'84 Cali 2 Guzzi, '95 Guzzi mille, '84 R65LS, '84 R100, '82 R100RS, '05 DL650, '72 Bultaco Sherpa T 350, '78 Montessa 348, "00 XR650R