Soroban wall abacus

This is for a soroban abacus. The bead on the top row are fives, the bottom four rows are 1 beads. Values higher than 9 are carried to the next column.
https://www.youtube.com/watch?v=w8pfEi-Vnzc&t=49s

There is a zip file with an scad file that has parameters for changing the the number of rows to accommodate as many beads as desired. Remember to print new rails to go with the new columns.

There are two choices of beads LH1 if for printing with a layer height of 0.1 mm and LH2 is for printing with a layer height of 0.2 mm. The beads are designed to promote bridging that is depended on layer height.

Each column needs 5 beads, one rail, and one rail peg.

The models print without supports, but some bridging is required.
The Different sized center pieces my be used to make an abacus with 7 to as many columns as desired.

Traditionally, abacuses come in odd numbers of columns.

I've found that using different colors for different columns works well. Translucent or shin