I found that my thrust bearing assembly was assembled incorrectly (two washers on one side.) I think its a test from the manufacter to see if you are paying attention. !!
I put a dab of thrust beariing grease in when I reassembeled it.. its smooth..
Also found that in Mod you need to relube everything after each race day..as a precaution.. now the diffs like butter.
I'm going to try spool on carpet tomorrow .. should be good.