Edges of foamcore

[Roger Booth]

When I started my Mouse Droid I was going to use the foam core but realized it wasn't strong enough. I still have the shell and keep playing with it to try ideas out, I've tried normal polyfiller like in the below Youtube mouse build and it does work but you do get a raised edge from the paper coating on the foam core.

https://www.youtube.com/watch?v=LLVgWnnXKW4

https://www.youtube.com/watch?v=lx3ZuGhBZ8c