I was noticing that some of the differentials had different numbers but some of the cars accelerated and coasted oddly, so I thought I would change some of the numbers since there is a default settings button. Problem is that the numbers do NOT reset to default in the differential. Now since some cars had different numbers and there are so many cars, can you guys fix the reset button? Otherwise I need all the numbers for all the cars and if there are alternate set ups for certain tracks I need those numbers too. Please fix the default button.