I use stewmacs bit which is like 25$ but comes with two ball bearings AND it comes with plastic tubing for additional support, then i use stewmacs templates (like 5bucks?) which are done by laser i believe, so they are very accurate and its a strong acrylic base, although if you do run the router to the edge of the template it will tear into the template, but the small nudge can be fixed by some dried superglue and such.