Also alpha knife suppy there pivots are really big and bulky and plain looking but I find myself customize the pivot head my self for emaple you can put it in a hand held drill have the pivot head facing out push it on a angle and spin the drill on your platen the spinning of the drill makes sure it grinds the same all the way around if you leave it on 1 angle you get a bevel if you angle it in and out while it spins it makes it to a dome many ways to get creative with these
https://www.alphaknifesupply.com/shop/folder-pivots