I never cut any ribbing off the wheels. All you need to do is trim the bead on the tyre down buy about 1.5mm so it fits the wheel nicely and then glue the outer bead only, leaving the inner one unglued.
Either that or trim the outer rib off the wheel so that the tyre bead sits properly. I feel that makes the front end have a little more grip overall but feels less precise.
If you dremel the staggers they will last longer too and have a bit more grip.
Noone I know runs inserts in them.
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