I have a parallelogram shaped chunk of foam, the kind of foam you find in headphone ear pads. Let's say it's 50mm long on both sides and 5mm thick.
What is the best way to cut 5mm long, 2mm diameter cylinders out of this parallelogram chunk? I need to do it with reasonable precision. I have no special tools but can buy something indicated for this task.
The only thing I can think of would be something like a fruit corer but on a much smaller scale...
I dont know if any such thing exists, though.