OMG what a difference the Duet WiFi, after much re-connectoring and configuration, runs beautifully.  Somehow though, in the middle of it all, the extruder numbers wound up at 200% of where they were before.  Talk about a mess figuring that out. :)  Adding the Panel Due makes for a really nice control interface right out of the box.  The web server UI provided by the Duet is excellent, and does everything that Octoprint did, except for the webcam.  It even makes manual machine calibration reasonably easy.

Anyway, after years of listening to the steppers whine and moan, the loudest thing is the fans.  Plus, all those weird aliasing marks on the surface of my prints have disappeared - seems that having a more capable processor and local file storage has really helped a lot.

Also got sick of the original (plastic!) bed locators, which over time had really badly deformed due to the heated bed.  Turns out a trio of hex standoffs, with one of those springs they use to hold together cheap picture frames does the trick very nicely.  Looks a whole lot cleaner too.

Stoopid heated bed has developed a nasty hot spot over the last I don't know how long, to the point that it's scorching the heater's high temperature covering.  Going straight to 90C bed temperature results in the scary 'where's that smoke coming from' situation.  Until the replacement arrives a few weeks hence, I'll have to baby it by only raising the setting 10C at a time, resting, repeating until close enough to the target temperature  that I can kick of a print.

Also, one of the axes is starting to leave black streaks on it's vertical rail - guess it's time to look into using rollers rather that a simple sliding contact.  Sigh  :)