Are there some barrel vise inserts to handle Remage pre-fit barrel swapping tasks that will work well using a general purpose vise, or do barrel vises need to be separate from your general purpose vise? On the other hand, is there a good barrel vise that easily pulls double-duty for other more general purpose tasks? Please don’t break my heart by telling me about this wonderful combo best ever vise that you have that they don’t make any more unless you are offering to sell it. 
If the general purpose vise and barrel vise need to be separate, is there a good way to drop in the barrel vise on the workbench when you need it, or does it need to be more or less permanently mounted? Mount the barrel vise countersunk on some 3/4” plywood and clamp it down with c-clamps when you need it or drill the bolt holes for it in the bench top? If drilling a bolt hole pattern for temporary mounting, has anybody seen some tools that use a common hole pattern so you don’t have to drill too many hole patterns in your bench, or a good system to temporarily plug the holes when you are not using them, like some pieces of dowel with a little bevel on one end?

If the general purpose vise and barrel vise need to be separate, is there a good way to drop in the barrel vise on the workbench when you need it, or does it need to be more or less permanently mounted? Mount the barrel vise countersunk on some 3/4” plywood and clamp it down with c-clamps when you need it or drill the bolt holes for it in the bench top? If drilling a bolt hole pattern for temporary mounting, has anybody seen some tools that use a common hole pattern so you don’t have to drill too many hole patterns in your bench, or a good system to temporarily plug the holes when you are not using them, like some pieces of dowel with a little bevel on one end?