Yes, I’ve got what I consider my best tool. It’s basically a 2’ piece of 2"X3/4" bar stock. When I explained what I wanted to a friend who’s an amateur machinist he agreed to try to do it just to see if he could! What he did was to machine 4 grooves in each of the corners the depth of 2 thicknesses of masking tape and to the width of 1", 2" and 3" (HO scale)and on the 4th grove the distance between horizontal ribs on an Athearn F-7 radiator grill
To use it I lay out two strips of masking tape, cut a straifgt line w/ a single edge razor blade, lay the appropriate groove against the tape and cut along the bar and Presto! two strips of 1 2 or 3 scale inch masking tape.