Geocaching Magnetic Pen

If you're geocaching, sometimes you need a magnet. Either it's at home or in the car far away.
In some steps you build the ultimate magnetic stylus.
Thanks to Reika for the inspiration

Step 1: Step One - the Magnet

you need a (neodym) supermagnet 4mm diameter , length 10mm

Step 2: The Pencil and the Magnet

what you've to assemble at last.
the magnet and a Uniball PowerTank ECO, a commonly used pen in geocaching.

Step 3: Disassembled

The stylus disassembled

Step 4: Where the Magnet Fits

The magnet fits inside the transparent tip. for that you've to shorten the green part.
Don't cut too much. :)
correct it with a knife until it fits

Step 5: Assemble & Test

Assemble the stylus and test it with something magnetic

Hint:  Do NOT glue the magnet. Probably you need to reverse the polarity