I like the design of the original caliper mount, but I managed to snap a supporting vane off mine while removing it from the print bed.  

I remixed that model to thicken those vanes slightly, and now I have no troubles printing robust versions of these in PLA, with these settings:

• line width of 0.42mm 
• layer height 0.25mm
• 4 walls
• 20% infill

This model holds the weight of a regular digital caliper comfortably, when mounted with an M3 screw & nut insert from the original HSW model.

Printed 4mm taller, it can also comfortably hold two plastic calipers.

UPDATE-17Oct'23:  Increased the height of the lip on each vane, to reduce the risk of accidentally knocking the calipers off the holder.