B4 front wheel and tyre combo issues

[Jeffjeffdejeff]

Hi all.
Getting back In the game at the mo and setting up an AE x6 squared. Now I bought some DE racing borrego rims in black (wanted black rims) and some Schumacher front ribs as I'll be on astro when I finally get going (hoping to join Silverstone in the new year) but I've found that the bearing fitment rims are too wide for the schue ribs. I've looked online and find that people cut the rims Down in the inside but surely this leaves nothing to glue to?

And advice appreciated. Also do I use inserts? Rears are fine. It seems that B4 bearing fit rims are limited.

Thanks guys.