It works great. have seated over 100 primers with no issues. I bought a 6 pack of MJC primers on Amazon for less than one Hornady primer tube. Fits perfect. I havent filled the tube so not sure how many it can hold, but it's about half capacity of a full tube. Below is my rough design for the plate. I've been using just a .12 thickness aluminum plate and it works fine. My final design will be 5/8th thick, and have two brass 6mm long "feet" on the underside of the plate to hold it in place. The feet will just drop into the spare cam pucks on the press. I'm using brass so they don't mar the DLC coating on the pucks. I experimented just drilling a 6mm hole in the aluminum and screwing in a stainless bolt. It worked well, just won't look as nice with the bolt head sticking out the top. I'm waiting on an 80 tooth carbide saw blade to cut this thick plate. Will post pics and update when it's done.