I did a firmware update to my good old faithful Prusa's yesterday with the latest MK4Duo Version 4.3.3 Stable ( https://github.com/MKFirmware/MK4duo )Lots of cool added features and a lot more stable then Marlin 1.1Xbugfix was in terms of thermal runaways And it seems to be a big improvement running the DVR8825 @ 32 microsteppes with less motor vibrations with less power usage to them.
I still can not get Babystepping to work but the 4 bed corner leveling and linear leveling feature work like a charm. It takes a few mins to get use to how everything gets setup and Pin setup is a pain at first, If you have thermal couplers and fan extenders or anything that uses the AUX pins, you can not use the Pins.h to set them up, you'll need to use Notepadd++ and open boards file under src\boards. Other then that, I'm really happy with how my Prusa's Run with the firmware. Anyone gave it a try yet?