What I meant is that once you have a "rough" idea how long your Noalox lasts you, you can swap it out a week or two sooner than that amount of time. That's how I settled on somewhere around 1 month for me.
As for the menu, that happens to me too, but I think I'm just from hitting it one too many times. It seems like I always have to round-robin back to the beginning if I'm trying to turn mine on or off. Try pressing 3x quickly and see if you can stop on the 1st menu option.
The only advice I can think to offer you in regard to your 510 threads is to shine a flashlight down into them and see if you can spot an imperfection in the threads somewhere. If so, it might be possible to use a sharp tool to correct that spot in the threads. The best thing might be to have a stainless 510 male connector that you could work into your threads in and out until they worked better, but stainless male connectors are not very common. I was going to say I don't own anything that's stainless, but now that I think about it, I believe that airflow controller I mentioned previously is stainless. Did you ever decide to pick one of those up?
I went up to the new MadVapes store that same day, but they didn't have them in stock, and it's a bit of a hike from here, to the north side of the county, so I haven't been back, and *right* after that, I ordered that Nautilus which I thought would fix a lot of things, but unfortunately did not. I'm going to post that in the classifieds today, got it all cleaned up, and yesterday got some nice pics of it.
I have a spare eGo charger, I might be able to use that.
Andria