No, I don't have an Opti-visor. I can't do that tiny detail work anyway as my hands shake too much. If I were to say what tool is the best I have I would have to say the Dremel rotary tool. I have 2 corded models. A 15 year old multi-pro and a new model 300 which I just picked up this week. The old unit still works well. The only part I've had to replace on it is the brushes.It is rare that I disagree with Jeff, but I don't consider DCC an accessory. It might as well be dog poop if I didn't have it...it's vital for my MRR experience, just as if it were an only locomotive.
Sooooooo.....I would have to say my Opti-Visor ranks right up at the top. I don't know if you have one, Jeff, but in view of your circumstances, and me at mine, working on teensy things in HO (forget N) is a challenge many times, and I would be on the beach without a visor.