Big picture... Here goes... I'm building a built-in closet, which essentially consists of three boxes. The box I'm busy with now measures 34" wide by 88" high by 24" deep. There's one shelve half-way up. I have the sides ripped and ready to go (cut 1/2" wider with skill saw, followed by "honing-in" rips on the table saw). Problem is with the 34" back panel, since my contractor style table saw can't rip that wide (and I would uncomfortable doing it as well). So the plan is to do a rough rip with the skill saw, and then bring to dimension with a router and straight edge guide (I have a long metal one that is clamped on). I have never used a router before, so my first attempts at this consisted of running the edge of the router base plate against the guide (no bearing on bit), but had a hard time gauging the depth of the cut. So next I'm going to try this cut by clamping the guide right on the cut line, and use a pilot flush trim bit running against the guide (clamped to the bottom). My fear though is that the bit will scuff against the metal guide.