While trying to improve print quality by increasing belt tension on the X and Y axes, I did some routine maintenance.  I oiled the rods and tightened screws.  While I was at it, I took a look at my insulator retainer.  It had developed more two and a half cracks.  It had actually cracked all the way through one of the screw holes.  It was still working, but I’d rather not chance it failing while I’m printing.

So, I replaced it with one of my printed insulator retainers.  I gotta say, it feels really great to swap out a stock part for a part I built on my own ‘bot.  I suppose this is more of a repair than an upgrade… but I still choose to think of it as an upgrade.  :)