Ah, I understand what you're referring to now.
FWIW, here is the modification that I'm doing to T&D street rockers:
We bored the stands for a bronze bushing that takes the slop out of the stand/stud relationship, and then fitted the heads with TimeSerts. Once the rockers are installed with the bushings, there is no movement like there was before.
I did this on my 352, which is sitting almost at 700 lbs open pressure and turning 7500 rpm. After this past dyno session, I pulled the rockers off and there was no fretting. With the previous iteration, there was fretting shown on the steel shims underneath the stands.
I feel confident in this setup and I will use this on Tunnel Port builds from here on out since they are such a pain to fit them with T&D race rockers.
For anything else, before I would have custom stands or rockers made, I would just move to the T&D race rocker. Securing the rockers with a head bolt and using a paired rocker is the absolute best way and will withstand >1000 lb valve spring scenarios.