Bar Clamp - Twist-On

One of my Prusa Mendle Y-Axis [Smooth] Bar Clamps cracked as a result of it being slightly over-tightened while building my printer. The printer's been performing just fine, but I recently I wanted to upgrade the Y-axis PLA bushings to LM8UUs and,
a) didn't want to risk the cracked bar clamp failing completely during upgrade, and
b) didn't want to start tearing the whole printer apart for the sake of ONE bar clamp.

So here's a bar clamp that:
* is easy to retro-fit without disassembling yo