I may have answered my own question as I am reading the manual
The version I have purchased has been coded to function with PMDG 737 but V3 may not be able to read all the parameters
Is it possible to inform me what the limitations are and what parameters that V3 will not be able to read
You got it, Clive! None of V3 copilot actions (eg lights, gear and overhead panel) will work on the PMDG 737. That aircraft is completely coded outside ESPs SDK. To that end, V3 checklist are completely useless on PMDG aircraft; you can still use it but the copilot won’t be able to manipulate any of the controls. Use FSFO 737 on your PMDG 737 and V3 on all others.