For those of you who are running a coyote with a TKO, did you have your TKO upgraded with carbon fiber blocking rings (2nd, 3rd, and 4th) or are you just running the TKO stock as it came from Tremec? If you are running a stock TKO from Tremec have you had any problems with high rpm shifts?

I'm wondering if the carbon fiber blocking rings upgrade available from Bob Hanlon or Liberty Gears is worth it.

Thanks,
Wibby