I used Polyvance Plastifix to rebuild the bottom of the radio opening and knobs where it had been cut out. It also worked great on a cracked wiper switch stud, and a missing tab.
https://www.polyvance.com/PlastiFix-Kits-1/2503/
The steps for reconstructing a tab are shown in this vid
Their website has videos for other types of repairs. Pictures of mine below.
Using the molding putty to rebuild this wallowed out radio knob hole
Studs are easy. Platifix can be applied in layers to reinforce these also.
The area where the bottom of the radio opening was cut out was also repaired using the molding putty.
Radio opening rebuilt, knob holes filled, and new tab added
