@Nairy Thanks for asking. It's really going great. Got the chance to get my hands on used armour from a trooper who wanted to retire. Only had to do some little adjustments and got approved by the German Garrison. You can call me TK-30455 now ?
I wet sanded the Bondo on the chin extension and on the battery compartment and speaker. Wet sanding gave me more control over the amount I was removing. It's not perfect, but I'm happy with the way it came out. Thanks again for the guidance gmrhodes13.
Here's a look at the inside of the chin extension: