I've been using my Lemo2 for about 2 month now. Best RTA for TC mode so far. I had problems with wicking when using thick juice, and as I'm using them most of the time, I opened up juice channels about 1,5mm by filing chimney with a triangle file. It's wicking excellent now and I get consistent vape.
For those of you, who have hard time with wicking, here's a thought. If you have Lemo and Lemo2, try to change chimney's barrel (atomiser tube, according to eleaf) from Lemo to Lemo2. It will open juice channels on a bottom a little bit more, as metal of Lemo chimney is thinner than Lemo2. It may be worth a try and help with the wicking for someone. Sorry, if someone have already mentioned this, but I personaly haven't saw it yet.