Fountain Pen Organizer

I recently bought a Pilot Metropolitan fountain pen and wanted some way to store ink cartridges that had not been completely used. The design contains two pen holders, four ink cartridge holders, and one ink vial holder. It is currently designed for the Pilot Metropolitan and Pilot Iroshizuku ink but I am working on getting a customizable file so that it will be able to handle any pen or ink type!

For the time being, if you are interested in using this design will a different pen/ink pleas