This is the firmware for the PTL TAZ4.
It is a version of the 2016Q2 firmware from here : http://download.lulzbot.com/TAZ/4.0/software/2016Q2/firmware/Marlin/Marlin_TAZ45_Uaru_1.0.0.1/ With the modifications needed to make it work with our older TAZ4 with a Budaschnozzle.