I did build up the 3M adhesive on both, as well as use a bit of gorilla glue on them to ensure a good fit.
Thanks man! It's a TWM Abrams M1. Other than the knob, it's totally stock. Anything counter sunk will help bring the knob down lower on the shifter arm.
They were the smoked jdm ones on eBay yeah. They had zero issues installing, however they seem to have the smallest amount of movement once they are installed in place. It doesn't rattle, but it's def not tight tight in the bumper.