Balsa / Foam Stripper

Cutting strips of balsa wood or EVA foam with a blade and ruler requires some care and attention. A good stripping tool makes the job easier and safer, producing more consistent and repeatable results.
Balsa strippers are nothing new and there are a number of commercial and DIY models available - this is just my version.
For context and a quick demonstration please watch: https://www.youtube.com/watch?v=6i9WbRWzRuM

The stripper has 3 main parts: the "handle", the blade holder, and the interchangeable spacer plate.
The thickness of the spacer determines the width of the cut strip. The spacer is slotted
to allow for different height materials (up to about 8mm), and is sandwiched in position when the assembly is tightened together.
Rather than employing specific blades this stripper uses commonly available utility knife blades, most any should fit.

From the the STL files you'll need to print at least one handle and one blade holder, plus one of each thickness spacer you requi