Finger grip for Magnetic Lens Cap

Whenever possible I prefer magnetic lens caps for my camera over the usual grip-to-clip design.  However, the magnetic caps have nothing to grab or hold onto.  This little part fixes that problem, and provides clearance for the tether attachment that most people use.  See the photos.  Easy to print, use double sticky to attach to the lens cap.  It bridges over the tether end if necessary. Works great, even has grooves for better grip!

No support, brim or raft needed.  I use 3m LLPT automotive two-sided tape.