@jay_s_uk Thank you! I don't know how I missed that. I don't even know when that got added, anyway that is it. I haven't finished my print but I will post back after confirming.
Will check the voltage again...there was no reading the last time. I got the Duet3 working, but can't seem to get the UART on OI_1 to work with Arduino. Not sure what the issue there is....wiring is correct and the pin out appears to be sending a signal....wonder if the threshold voltage for reading is not quite there...might try a logic shifter