I read all the reviews and the bench mount RCBS came last week. I bolted the priming tool too the bench, no trouble with priming tube staying in place, I followed the You-tube video for setting up the priming tool. First few small rifle primers it was double dropping primers, I checked the small priming ram/cup assembly it was too short, I backed the cup off the ram 2 turns and went on to prime 200 ( 223 cases) without a single problem.
I have used the Lee handheld priming tools for years. If not for the Arthritic I may have continued with it. But I have used Lee equipment for years, and one thing I know from experience, 45 years of reloading, and bullet casting. Lee will get the job done, but in every aspect of reloading someone else makes a much better tool for the same job as Lee.
At times I have bought Lee because money was tight, but as soon as I could replace it I did .I have yet too find a single Lee Reloading or casting tool that did not get the job done, but in every case, some playing with it was necessary to use it, They work, just not flawlessly every time like most of the better brands do. Service life with Lee items are much shorter than the other equipment available as well.