sheck33 once bubbled...
i have been honest to them, i either dive that setup and help with the class or i will not do it at all.
A perfect description of "Option 1"
Blue Water: Re-read you Padi Manual. I'm sure there is a reference in there to donating out of the mouth and switching to an "Air2" for an octo.
Its all shades of gray, you just lean towards the side you think is better for the student.
I just audited a PADI Rescue diver class with all, but one, student in a Dir gear config. We added a section to the class to discuss removing a back plate and harness rig from an injured diver. 3 harness cuts with a sea snips and the harness falls right off.
If you have you are OW certified with a DIR rig, you will want to find an instructor who dives the same way and you'll get a lot more out of the class. All the DIR-F instructors also teach for rec agencies.
As to the first part of your question. I have my Padi DM and I have assisted in only one class. I wouldn't kneal on the sand to demostrate skills! So I said no thanks. I also won't work on boats off FTL because DM's solo dive to tie/untie wrecks.
DM is worthless, I wish I saved the money. If you want to stay focused on DIR, go to rescue, take DIR-F, round up some like minded buddies,charter boats and then you can dictate how you want to dive.
Life is filled with choices.
--Matt