Gridfinity 2x1 Tape Dispenser

This is a 2x1 Gridfinity Tape Dispenser that only requires an 8x1 0.1" pitch pin header as a blade.

Glue the shaft parts into the roller and glue the pin head into the front part as a blade.

You can sharpen the pin head with a file a bit for better results - 0.05" pitch might work even better (untested).