Steal throw-out bearing retainer

You can't just pop on a new bearing retainer. You have to set the endplay on the input shaft by shimming it correctly. If you don't do it right, your transmission will fail eventually because of it.
 
I called D&D performance about the shimming issue and if I should check the endplay. He said "99% of the time they do not need to be checked, so just replace the old shim with the new retainer".

So that is what I did...