Coincidentally I have been commissioned to produce three of the Printed Circuit Board Pens for Christmas presents. The main supplier GW in Australia only imports in bulk,next supply will be in the New Year. All he has left is the Purple Version so I bought some,was pleasantly surprised. I then found green ones in my stash. His half pricing is influencing the market here.
I like the Red one you made and photographed and using the Zephyr kit it must have been tight turning before a breakthrough in the casting. Beaut pen and thanks for sharing.
Peter.