So I wanted this MOC flic.kr/p/YLQEXs to feature a light brick inside the cockpit, and only had one possible place for a button mechanism. I didn't want to alter the look of the gun turret/base too much, turned out I hardly had to change it, only a round tile changed to an inverted round plate. One slope is there to push the light's trigger, the 2 others, while not absolutely necessary, keep things straight & stable. The outer ring prevents the button from falling off, as it lets the round plate pass, but blocks the slope parts. Works pretty well! (45 degree slopes fit the trigger's slope better, but don't work any better, only use more parts) I also have a design for a clicky flip switch, used in another MOC, if anyone is interested.
