This grip from PsykomantaBrain is great -- I've just optimized it to be easier to print on FDM printers (fewer overhangs) and made a "trimmed" version
Print settings:
arachne wall generator
0.6mm outer wall
if you are going to paint it -- scale the model to 100.01% in the slicer
orientation:

Full version:

Trimmed version:

The author remixed this model.