Hi, great thread and discussion about the SM here. I have a few thoughts and suggestions/comments to add.
I picked one up a couple weeks ago, and was really impressed, it's my new main tank. I've been out of the loop for awhile and wanted to try a subohm tank, something that will let me run a thick DIY dripper type juice, I did a bunch of testing on 100%VG occasionally adding only a few drops of flavour to 30ml or so, so very thick stuff (SM works great on thinner juice too btw). I still run a mech mod and see no reason to change. The builds I've been testing on are in the range of .2 - .4 ohms so that puts me in a range of 40-88Watts on a fresh battery. In general this atty seems to work best with cotton, but even with the high heat and thick juice builds when the air is wide open it can't keep up. So I started trying hemp fiber, which was actually worse in this atty until I started using the "pancake method" of wicking. Now I'm running thick juice, high heat, airflow wide open, hemp wick and it's keeping up like a champ. I'd like to add there's no gurgles or leaking and after removing the top cap to fill still no leaks or gurgles.
Consider trying the pancake method if you're getting dry hits, leaks, etc. Might want to try larger diameter build too as has already been discussed, I'm having great success with 3mm with lots of cotton to spread and fluff out, and is probably a good idea because the wicks do get cut even shorter using this method.