This is a stand that holds up to (5 )pens upright on a flat surface. It includes an optional tray that will hold up to (3) 2ml ink bottles (typical retail ink sample size)

This prints on one plate. It is just over 181mm in one direction so it may not print on the A1 without a little tweaking of the layout.

It's a little rough. I am new to 3D printing and modeling. This is my first upload. I'm sure it will get refined and updated more than once.