RDS Tuning piece
 

The guys are Marui decided to give out these fragile plastic little knobs to tune the RDS on the P90 RDS version. And the circle you put it in is metal. My piece has entirely worn off the sides, so I can't tune the RDS anymore. Anyone have any solutions?

What does it look like?

You may be able to use some other tools (allen key? Hex head?)

If it's a knob use a little creative engineering.

Drill two small holes on either side of the knob, put a screw into each of the holes (tap the holes for better durability) and torque the knob using the screws.

Solve'd