After re-reading his post he is talking about the front rotating assembly, which in your post you said you have had issues with the grooves that hold the steels getting notches cut in them. If you are using steel plates that are harder then stock that will only make this problem worse, honey.:hug:
no way around it , necessary evil IMOP , and its been this way with every trans kit on the market to date , the notching takes a fair amount of time to take its toll and make the drum unusable at common pressures .