Rip a factory edge off an 8' piece of plywood about 3" wide. Place it on top
of a an 8' piece 1/4" tempered hardboard that's about a foot wide such that
the plywood edge you ripped is on the left and lines up with the edge of the
hardboard. Nail/glue/screw the two together.
When the pair is as one, clamp it to a bench such that the plywood/hardboard
portion is on the bench and the "just hardboard" portion is hanging in
space. Take your circ saw and cut the hardboard for the full 8' length using
the factory edge of the plywood as a guide for your saw.
You how have a saw guide that's made to fit your saw and your blade exactly.
Line the new cut in the hardboard up along the line of the door you wish to
cut, clamp it and go....
Cheap and simple and accurate.
"Buck Turgidson" <jc firstname.lastname@example.org> wrote in message
Click to see the full signature.