On the topic of gear differentials. . Given the high grip track surfaces (black carpet) . Why do
all the top level kits come with a spool in the front as opposed to having a diff. I've also seen
mention of running a diff in front with "putty" or 500k-1-mil oil . I prefer a diff up front with 20-k
& 7-k in the back . My thinking on this , last thing I would want is the added friction induced up front by
a locked spool ( different turning radius).