I have the Ted Cash capper like your's but can't get it to work with any of my revolvers. I must be doing something wrong.It looks nice on first glance and it may well function perfectly but it's kind of plain, utilitarian, too much so for my taste. The artistic side Muzzleloading is a large part of the appeal. At least for me.
I use a Ted Cash snail style capper for revolvers. Holds a tin of caps and works for everything except Remingtons.
Otherwise, it works great for single shot pistols and rifles.