I am slowly working my way through replacing a uPrint trajectory control board with a Duet3D.
I am doing this partly to help my uni but mainly for my sanity (I needed an integration challenge)
Primary constraints were to make no permanent modifications to the printer and to be able to return the machine to factory functionality. Primary goal was to reduce operating costs and retain a reliable ABS capability. I intend to make the files available once I have an acceptable level of functionality. There has to be a stack of these machines tucked away in corners gather dust, just waiting for a new lease on life. Fully appreciate the build volume is tiny for the footprint but reliable, economical ABS printing has its uses.
As I am working on this part time, updates will be sporadic, but they will come. Financially the project is too far along to just walk away from it. Besides, professional pride won't let me walk away anyway 
Currently I can read cabinet and hotend thermocouples. These aren't calibrated yet but they do move in the right direction.
I can control the cabinet and both hotends individually and each will maintain a set (uncalibrated) temperature.
I can move the X/Y gantry and Z platform in the correct sense and roughly correct distances. Many thanks to the work done by drphil3d on steps/mm here; https://forum.duet3d.com/topic/10982/stratasys-uprint-retrofit-finally-complete
X/Y endstops work, so X/Y homing works reliably.
Top few items on a very long TODO list;
Z probe, leading to full homing and mesh bed levelling
Thermocouple calibration
Rebuild the blocked hotend (that's how I received the printer)
Start figuring out the extruder drive.