Ok...I saw a link on here with a nifty DIY circle jig using plexi glass. I copied it and it works great! BUT It can't make 6" circles. the base on both my routers is 3" meaning if I set the pivot point right against the router it would be a bit over 6" at best (more like 7"). I saw the smaller Jasper Jig (www.jasperaudio.com) and it can make circles from 1"-7 1/2". I cant get a good look at how it is made, and how it attaches to the router? Any ideas? how did you guys cut your holes for your ports?