For acrylic, of foamex type letters where you would glue or tape the letter in place, we use, what I call a “Baseline Template”. in stencil low tack vinyl
* Top – Template in paper.
* Bottom – Baseline template in low-tack vinyl or paper.
The attached picture is not “just right” but is the only one I have a picture handy of.
Basically, you use a low-tack stencil vinyl. but only cut the baseline of the letters.
sometimes, with difficult letters or fonts, we will use bits of template for the tops of the letters also. but that’s mainly for letters with curved bases.
In the attached picture, the entire template is cut in one go. so all the lines are pre-spaced.
applied in one go and the application tape removed.
Alternatively, you could use the paper that is waste, from your laminator and reuse it to create a template.
The paper is thicker than normal paper, so it does not tear just as easily and is a bit more stable to tape into place.
If you set your vinyl plotter to perforation cutting, it will plot hundreds or thousands of little cuts through the paper and once finished, you will be able to push through the letters leaving a stencil version of the letters removed from the paper letting you use it to position your lettering.
A full paper template is great for templates where you use screws etc. But obviously won’t work in this instance.