I thought I'd share this little bit of info if it'll help anyone trying to get their forks apart.
These are what I use to hold the innards still while undoing the Allen bolt at the bottom of the sliders
Long bar is simply a 3/8th drive socket welded to a length of rod welded to a 3/8th extension bar.
Sockets are driven over the threaded end of bolts that fit in the damper rod end.
11/16ths head for the Special's forks - should be the same for RH's. 17mm is too small.
3/4 head bolt for the standard forks
This is how they fit in the end of the damper rod (previously inside fork tube)
Just feed the bolt down the inside of the fork tube till you feel it bottom on the damper. It may take a bit of wriggling to get it to engage in the recess but be patient.
NOTE - It will still require some downforce on the socket/bar/bolt to hold it properly as it's not an exact match to the damper recess, so it would be very helpful to have a helper to undo the Allen bolt from below. Otherwise, remove the spring and compress the fork so you can then reach both ends at once.
Hope this helps.