Build a Saw Guide for Perfect Cuts
To make the saw guide, start by marking a line and cutting a 5-in.-wide
strip from the edge of an uncut sheet of plywood (photo “Cutting a straightedge”). It
doesn't matter if you don't saw perfectly straight
because you'll only use the factory edge. Draw arrows
toward the factory edge to identify it.
You could simply clamp this straightedge to the plywood as a saw
guide, but then you would have to compensate for the distance from
the guide to the saw blade every time. The photo “Building the saw guide” shows
how to build a guide that you can line up with the cutting mark, a technique
that is quicker and more accurate. Attach a 12-in.-wide
strip of 1/4-in.
plywood to the
short screws. Make
sure to face the
factory edge of the
the excess base
material. Then, with
the saw set to a
45-degree bevel, run
the saw's bed along
the straightedge to
cut off the excess
base. To see a video on how to build
this saw guide, download the September iPad edition.
Make another guide just like this one, except set the saw to cut 90
degrees when you cut off the excess 1/4-in. plywood. You can use the
opposite edge of the same sheet of plywood for the straight edge. Use
this guide for non-beveled cuts.