Bea-
I am a newbie to this as well. My wife and I have been working on each other since Christmas or so. I am no where near as prepared as you! I’m seriously considering following in your footsteps! We bought a $500 machine and just don’t know enough about how to use it. I should pick up some of the books you ordered and maybe the machines and probes as well.
Anyway, I’m weighing in because I’m a dentist. I have Orascoptic loupes (2 pairs) and would recommend them highly. I have a set of 2.5 magnifications that were about $900 and a set of 4.3 magnification (cost is $1600). I also purchased a light that is mounted to the loupes for about $800. If you want details I’m happy to provide them. It takes some getting used to, but you definitely have good depth perception. I suppose I have an unfair advantage practicing with them every day at work The depth of field decreases with higher magnification. I only get about 3 inches with my 4.3’s. You just have to get used to working at that distance.
When you get loupes fit to you, they measure the distance between you eyes, the angle you want to look down and your working distance (where you want your hands). The disadvantage of it all is that you may not have the same as someone else. They are custom made for you, so hopefully you’ll be able to share.
A dental convention would be perfect. Orascoptic is not a cheap brand but they have many others. I’m a dentist for the US Navy, so Orascoptic is the brand the gov’t buys from. I didn’t pay for my loupes out of my own pocket. Heine is a brand of loupes that are adjustable. It probably makes more sense for you if you want to share them with someone else. I’d probably avoid the expensive mounted light. It’s tough to see teeth since they are in the shadow of someone’s mouth, but the back/legs/etc would be easier.
Let me know if you’re interested in selling some of your books!
Robert