The Manfrotto hex QR plates have holes for "locating pins" to keep the camera aligned. I don't recall seeing pins come with any of mine, though I see one plate advertised with one. With some leverage used in tightening the QR plate to the camera, the plate sometimes holds the camera tightly, but not always.

Any ideas for either finding or creating one? I assume the latter might involve using a metal file to round the ends of a short piece cut from alength of brass or steel stock of the right diameter, maybe available from Home Depot, and attaching some kind of washer that would keep it in place, unless epoxy would be a better solution. As you can tell, I'm not much experienced with tool-making.

Alternately, perhaps there is some liquid rubber to be applied to the plate surface to prevent the slipping.

I'd appreciate any guidance.
Thanks.