You obviously took a great deal of time, thought, and effort to share your personal methodology, and I think it's wonderfully kind of you to share your perspective!
I did want to call your attention to something you may not be aware of however in the following aspect of your shared suggestions/method.
In another forum (rather well known) there was a monster thread about steeping, and whether or not to heat, etc (a couple thousand posts) where some individuals did some empirical style testing, and were able to verify (through titration testing) that there is a measurable loss of nicotine potency above a certain point (temperature wise).
IIRC the number was 150°F.
Now I forget what the ratio was (decrease in efficacy of nicotine vs increase in temperature), but I read through the entirety of those 2000+ posts (which is where it left off when I last saw it almost two years ago). The main thing I took from it (for my point of view) was that I didn't want to exceed 125-135°F which, again IIRC, equated to a 1mg loss of nicotine (important if you're only mixing 3mg to start with, but barely important at all if you're mixing 12-18mg or more). In practice, I don't ever exceed 115°F anymore in my ultrasonic cleaner. But that's where mine maxes out fortunately.
I remember the loss was noticeably greater at 150°F, and fairly sure that Temps above that was not recommended.
Anyways, given you're using (and recommending) 185°F, I would definitely recommend looking further into the correlation between nicotine efficacy and temperature. Especially if you're mixing 3mg or less.
Hope you don't take offense, as I only want to see you (and others) have the best possible experience (and results)!