You know, there are so many issues to look at with the DM-Instructor relationship, and this is one of them. Please remember that you are a professional now and do have a certain level of training, as well as the standards list too... Having said that, nowhere does it state in any standards that your equipment must match the shop's or school's. It does state the minimum equipment required like -BCD(no particulars), MFS(SDI and PADI-just that you have snorkle not wear it on your mask- I never would underwater and I explain to students who ask why), reg with appropriate guages on console, flashlight, signal sausage... SDI requires my computer) That's off the top of my head here at work, so ya'll don't get your panties in a twist if I skipped one. BUT never does it say that you must match the student's gear.
Yes, it is better to demonstrate skills in gear that is the same or close to the same as students, but once done, your own gear in the sea is safer and more comfortable for you. It also opens a door to sell more courses and equipment- if the shop is smart about those curious lil new divers. But, in any event, I have had enough to deal with with control and safety of the class in their sea dives to worry about my DM having a hog or BP/W... I want him or her to be ready to assist my class to their fullest ability, not being uncomfortable in their own rig.
Now I am going to piss off some instructors. Being one myself, I have played the DM And instructor roles. I still do. At my shop, we instructors DM for each other as much as the DMs do. We find we are better instructors And better as and to our DMs by working like that and our classes are smooth and synchronized. There are instructors who utilize the DM properly and those who don't. Some see the DM as a true assistant and partner- thus communication is fair and not dictatorial, and then others who like to work over the DM to show power and superiority-these don't think they need a DM anyway and use them as slave/scut labor, and many in all ranges in between. I have had experience with all ranges, so just know which ones you can talk to and discuss things with. If you find that an instructor does not work well with you, don't work with them. There are plenty of us that love a good DM who we can trust. Their loss not yours.
By the way, I dive a Zeagle tech but changed the plate back to singles for teaching(too lazy to lug my twins), I LIKE my long hose, and I have force fins(totally not school, but easy and fun), while other instructors and DMS at our place are running- BP/W, vest, wings, varied setups. They pick up a school BCD for the pool( which are all Zeagle rangers by the way, and our shop owner sells ALL the above configurstions. He loves the questions and gets to show more equipment. Win-win.
Okay, soapbox done.
By the way, I understand- I went form a vest to a harness, and Can go back, just don't like it and wouldn't for modelling proper bouyancy in front of students.
Sail on,
Dee