I appreciate the adjustment to the credit card rule but I don’t know about the 1mm smaller diameter tires. The glue in guide adapter on both of my cars have been put in at a depth to account for the larger diameter. I don’t know if they would work with the smaller diameter of the front wheels. I will check on it.
I can tell you that increased float makes a huge difference in the performance of these cars. I am running my body screws all the way out and allowing the body to have tons of float.