With the increased tightening of the chains, the existing slider became quite prone to jamming. To address this I needed to redesign the guide arms. I decided to add bearings as contact points. In order to get the placement of this points right I started by printing an adjustable set of linkages.

After som fidgeting and some trial and error, I was happy with an specify configuration. I redesigned the slider block with a set of (permanent) guiding elements.

Next, i began to work on the spool holder and gear transmission needed to roll the chains.