Back in the old days F1 ran on foam tires! It was not a fun time as some cars ran om 1/10th tires and some ran on big 1/12th tires. You could not run the tires to the rims as the chassis would not let you. The class died. The rubber tire version we have now is fine with the current rubber tires available. Going back to the foam tires which don't look realist will not solve the problem- it will just create a bigger problem. Been there and seen that before. Just work on the set-up- yes it can take some time.