This is the best dust cover option I've seen. Tight tolerances, looks great.
If it's not clear, you don't need to disassemble anything. Clean the area around the original dust cover and then spin it counterclockwise (you may need to some needle nose pliers to get it going). Insert the new dust cover halves, and then spin the original back down. Don't tighten the original too tight, it needs to spin freely with the threaded rod.






















