Gregory's Serverrandom internet image of the type of pipe I am thinking about. maybe the pipes are too thick tho. only good for realllly fat tip marker
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2 comments
 @GustavinoBevilacqua my ideal marker is openable from both ends and uses some standard screw dimensions so changing the tip is as simple as unscrewing them. maybe a nut on each end so as something to help unscrew them when they get all dried with sticky ink |
@liaizon
The most difficult part is the tip.
Once you have found something good for it it's pretty straightforward to make a container for the ink.