Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:3898713.

While I love the design of this divider, I knew I would have an issue with keeping the spacing while I was marking. All I needed was a pin that could be tightened to provide either a little or a lot of friction.

I have included the Fusion 360 file in case not everyone has small M3 screws like I do. You can edit the threads to go longer.

Also, depending on your printer, you male have to drill out the hole on the female pin. My bottom layer squished and made the hole too tight.