Building up plastic

[Seattle Sam]

The hard plastic "horn bar" (center section) for my '70 steering wheel has two bosses molded into the back. These bosses receive brass inserts which appear to have been pressed in. The brass inserts receive Phillips screws which attach the center section to the metal horn actuator and thus to the steering wheel.

On the standard wheel I have, the inserts have been pressed in level with the top of the bosses.

On the burled wood SS wheel, the inserts are not pressed all the way in (about a 1/4 inch out), and one of the bosses has a side broken off.

I have two questions: Should I try to press the brass inserts the rest of the way in on the SS center section? Will I risk breaking the bosses worse than they are now? If I dont press them in, won't the center section sit noticeably too far from the steering wheel?

AND, What is a good product to build up the boss where the piece is broken off, so there is support around all 360 degrees of the insert?

Thanks for any help on this -
-Sam