I've discovered a new method that is far safer than adding super glue to the metal tabs.
If you remove the three metal tabs, and slowly increase the diameter of the holes in each tab by using a drill, you now have extra rotation. This extra "play" or rotation in the front lens element, will allow you to better calibrate "infinity" focus.
My method: I started with a 1/8" drill bit and held the metal tab with a pair of pliers. With the drill in reverse, I started to bore a hole. After a few seconds, I switched the drill into forward mode and held on tight with the pl