Low-profile two-piece vises for the CNC router

I replaced the little 5-axis mill with a router recently, and needed a low-profile vise system for holding large workpieces. I&rsquo;ve heard good things about the SMW Mod Vise, but they are designed for fixture plates, not 100mm pitch t-slots like the router has. And 3 sets to cover the hole table with serrated inserts would be pretty pricey. I came up with a simple design that uses these…