The guide from Jasper does not list all the routers the jig will fit. I have a Milwaukee router that IS NOT on the list. I was going to buy a new router when I ordered my jig. But the jig did have the right holes to fit my router and it works fine.
I use a 1/2 carbide endmill in my router. When you use a 1/2 bit the hole will be a 1/4 inch larger than the markings on the Jasper Jig. So if you use a half inch bit and need a 12 inch hole you need to put the pin in the hole for 11 3/4. Hope this helps.
