I have a poor-man's moxxon style vice I made a while back. It works pretty well. I sometimes think of making a proper one but one thing stops me. I don't use the one I have. I've gotten in the habit of always sawing joinery in my face vice. Drawer dovetails, tenons right in the vice. For wider pieces where the moxxon might really shine, I usually clamp one end in the vice and use an f-clamp to secure the other end to the workbench. It's faster than mounting the moxxon and doesn't take up any space on my small bench.