One of the extra features I was planning to add was a lock for my door. I had a local lock smith key a cabinet lock to match the same key I use for my Master switch.
The locksmith provided me with a thin steel plate that I was able to slip in between the Lexan and aluminum tube of the door. I pre-drilled holes in the plate that I later used to rivet to the door.
To get the lock as close to the edge of the door as possible, I needed to fabricate a bushing. Without the bushing I would have needed to leave clearance between the lock and the metal tube of the door to allow room for the nut to turn. I used some scrap aluminum tubing with an inside diameter of 3/4" as my bushing. Unfortunately, I wasn't able to get the lock close enough; the latch mechanism just barely overlaps the window frame tube. I'll need to get a longer latch from the lock smith.
