if your running that many students thru a year, then the regs should be serviced yearly as stated in most owners manuals!!! the plus with AL micron is you do get free parts for life as long as you keep up on your service!!!
LOL, we are in Libya!!!! We don't have service centers or anything that you have back home in the US. I have to take the regulators with me to Europe when I travel there for service which is VERY expensive. We are living under most difficult conditions here. Sometimes I can hear the heavy artillery going off in the distance when I am teaching.
We aren't teaching a huge volume here, or at least not yet btw
No warranties or free parts here either. We are on our own and we exist and live as best as we can. The only reason I am offering class and teaching here is because I am crazy about diving and about sharing the love of diving with others. I am sure you can understand and appreciate this.
BTW, I owned a dive center in NY for over 10 years when I used to live in the US and I had the same experience with rental equipment then as I do now. We used to service our rental equipment once a year. We had AL, SP, Atomic and Mares then and we eventually got rid of all brands and kept SP and Atomic and never had problems after that. We used MK20/G250 for our rental fleet then.