This part has been created to replace the original clips which became brittle and broke after some years. 

Print this part standing up with a small layer height. 

Using PETH I had the best result by grouping a set of four and then printing group by group instead of layer by layer. 

Reuse the tiny worm-screws from the originals and take care to only tighten the screws barely enough to fix the strings. otherwise the clips will deform.