You must have noticed the extraordinary price of pen-holders for the comparatively reasonable priced nibs to go in them. As an engineer I really cannot resist having a go at making this stuff. There is a fine video by Christopher Yoke from the Yoke Pen company that is my basis for construction. He does leave you to figure out how to finish the pen. The raw materials are really cheap. It should be possible to make many from these quite large quantities. Pictures to follow.