can anyone explain to me on guide bushing use.i have the triton router2 1/4h.p. i'm working on a round fishing rod holder,i want to rout 8 - 1 3/4 round circles a1/2 deep.i'm having trouble figureing out what size templet to use and what bit & bushing .i haven't used any bushings yet,have only table routing any help would be appreciated. the round circle are for the rod butt to set in.