Yup, I use old metal pen bodies and file the edge sharp to make foam cylinders. But the rollup eyes, and the spun foam lets you create colour patterns and non-cylindrical shapes with the foam itself. Its a construction technique I'm gonna explore and add to the foam plug, dremel tool box of tricks.

On the paper trimmer/cutter, you can quickly turn a sheet into spagetti, then fold the strands in half, cut them, and repeat until you have a pile of 1 inch noodles to spin. Wider, linguini style is good for chernobyls, club sandwiches, etc. Its a handy tool to have.