I have 2 of them and have been happily using them for a while now. I got the 2mm air intake holes. I run them without the fill hole poles.
Im running them with 400 count mesh and 28g SS, very loosely rolled and they wick great. I never thought I would go back and try a true Genesis again as my last try was very difficult and so much work that I said it was not worth all the work, but that was 4 years ago?
I have a few MCR
mods , a couple of them the 20mm tubes and love them. A few months ago I saw the flash sale and thought , what the hell..... for that price , if I cant get it going, I was sure I could sell them.
This time my experience was much better, though I had the best results from the mesh instead of the rope.
I tried doing the cotton because I like cotton wicks and with my past Genesis experience I did not find that all that work equated better taste or performance. I do like the 303s with some of my NET and a couple Lemon bakery liquids that were just too sweet. On the Genesis they just taste so much better. The sweetness has become a nice smoky, more subtle, but still lemony . The sugars seem to burn off with the mesh resulting in a more enjoyable flavor.
I dont get hung up on "what " is the best system, just what works for me. I have some atties that are cloudier, some that are tighter etc. I have atties to suit my needs and love them all. I have not found that RDAs are any better in flavor than RTAs. I dont like a lot of my liquids in Genesis's, but a few are better in the 303's.
If I could only keep one atty, it would be my Flash-e-Vapor, all around the most enjoyable and easy to work with I have.
I saw a few videos where the reviewer used a vertical coil with cotton and got it going good, at least on the video. One of them was Scott Bonner of Ecig
reviews. I like him, I have never been disappointed by anything he gives his thumbs up to. He liked the MCR a lot and he was using cotton, so ....
Anyway, I think the 303s will be in my collection for a long time... Im just stubborn , I guess and I figure if Scott got it to work and he likes it with cotton, I would like to at least try.