You can use a straight edge clamped on the board offset by the distance between cutter and router base.
6" widths of melamine coated chipboard are what I use as a straight edge for such jobs.
An 8' length is cheap enough and can later be used for shelving and such.
I use this method when buying full sheets of plywood from suppliers with no cutting service.
I take a couple of home made folding saw horses then cut the ply in the carpark with a cordless circular saw.
If the saw accidently moves a bit I do the same with my router once I get the ply home.
6" widths of melamine coated chipboard are what I use as a straight edge for such jobs.
An 8' length is cheap enough and can later be used for shelving and such.
I use this method when buying full sheets of plywood from suppliers with no cutting service.
I take a couple of home made folding saw horses then cut the ply in the carpark with a cordless circular saw.
If the saw accidently moves a bit I do the same with my router once I get the ply home.
