Arthritis in my fingers was making it painful if not impossible to release the dimmer trays. Wearing gloves was also difficult. So I made a pair of these old fart helpers. YMMV
I actually built a module extractor with 2 ends while we were still shipping L86. I'm sure I still have it somewhere most likely in a box with L86 parts. It came in real handy on the occasional service call that required removing all of the modules. Who knows, I may have turned on your racks back in the day.
Lin Wheeler
Senior Field Service Engineer
Electronic Theatre Controls, Inc.