I bought an early one which had a FW bug and borked itself. After about 6-9 months I got a replacement one version higher. It also borked itself. The front panel uses an STM32F103.
I have 2 front panels and the main unit which I had just modified to 3 wire plug. It works and there is a partially completed FW to drive it from the command line using a "blue pill" that I've not tried. I bought a used Keysight 33622A out of sheer frustration.
There's a huge thread on EEVblog about mods.
If I take it apart I can probably get it in a small flat rate box.
Have Fun!
Reg
