Or you could mount it to a small board and clamp it in the vise on your mill or drill press.Since I only want to use slugs I could probably get the roll crimper and put in my mill or drill pressfor crimping the loads.
If I put the MEC pro on a board then I have to take the board off to store it every time as it will not fit in the storage cabinet it is kept in with the board.
I understand it's not what you are wanting to hear but you already told us you have a shotshell press.
Thats is kind of like going to a boating forum and telling folks you have a boat already but you really want to know how to turn your car into a sailboat.