Spent the whole last week evaluating drag chains for Z. Printed 3 keystone jack brackets in the process, one of them with an arm to hold the chain.
This is the drag chain I settled on.
I printed two links of a Wanhao-sized remix before and it moves good. The original is larger and should have space for extruder and Z stepper wires. I printed 36 links plus the ends over two nights (28 of them on one plate in a single overnight run!), certainly better than 2 months trying to get anything from China.
