Found some of these in Nth America says I I can make a pen from them and here is one to prove just that.
Used a Slimline for bits as well. The nib can be controlled by the knurled part or conventionally. The timber is a piece of Jerusalem Olive Wood for soft contrast bit of engineering and voila (wont lose this one)
Kind regards Peter.DSCF0019-1.jpgDSCF0014-1.jpgDSCF0030-1.jpg