Universal printer vibration dampener remix

A 3D printer dampener to use with a practice PU golf ball (41 mm diameter).

This is a remix of http://www.thingiverse.com/thing:1992030, 25% faster to print and with 33% less matter.

My goal was to make a remix of Trobinou's dampener (which is also a remix), but with less matter and a shorter time to print (and with three screw holes for a stronger assembling).
On my printer:
- original file needed (according to Cura) 5.88 m, 79 mn and 18g PLA (17% infill, 0.2 mm layer thickness, no support).
- remixed file needs (according to Cura) 4.04 m, 60 mn (it took 54 mn) and 12g PLA (17% infill, 0.2 mm layer thickness, no support).

I made a prototype with a raw plank and the difference in noise is pretty noticeable (I can now print even when everybody is sleeping :) !)

References:
- This thing is a remix of http://www.thingiverse.com/thing:1992030.
- 41 mm PU golf ball: Look for "pu practice golf ball" in a Web search engine.