This is a tool to split and mark any length into equal spaces with ease.
The picture only shows 4 points but you can easily print more parts and add more points.

In action

Print instructions

Make sure to assemble from the bottom. You can actually assemble all the bottom and middle parts and then add the tops.

For every top part you want you need the same amount of bottom and middle parts plus 1.
For example you want 5 tops you need 6 middle and 6 bottom.

You will need some M3 screws flat head work best, you might also want to add nuts on the other end.