Thought this reference may help with the current discussion
I posted this model 13/09/21 on HC
https://hotcopper.com.au/threads/gurvantes-xxxv-spreadsheet-model-rev-10.6281973/?post_id=56013954
I have also posted a similar model for EXR and am working on one for JGH because that are adjacent to TPD.
Regards
OGP