The norm that works well at our track at TQ seems gluing the outside fronts only with the first top thread. I’ve tried different amounts on the sides from an F1’ style in the edge and all the way to the rim... didn’t notice a difference. However prior to tamiya changing the rules on the top thread, the amount on the sides did make a small difference for me. I also then glued the inside fronts and it was way to much loss of traction and the truck understeered to the point of making it worthless. That made the wheels to stiff. I have a sander so it was easy to remove with exacto knife edge while the wheel turning. Stick with the outside front and nothing rear and that should work fine.