MakerBot Board Covers by WRIGHT1 . Not a bad print but some noise from my Plastruder, just something like "crack". Cover Z is good so I started to print the Y cover. Unfortunately, the Retainer was binding making the head touch the print. That was the end of the retainer. By chance, I have a copy of the retainer in ABS (hope it is good).
It's now time to build and install my MakerGear HeatCore. I will also try to find a way to dissipate more heat from the insulator, that will help the retainer.