Hello Everyone, I'm fairly new to Vaping Underground but not so much to vaping (been a hybrid user for about 2 years and about to make the switch THIS WEEK to 100% vaping!). I recently changed over to an RDA and I totally in love with it. Coil building is something I dabbled with earlier this year after I got my Kanger Sub Tank mini. Now I'm just a coil builder and don't see any other way of doing things. But I have a question regarding diameter of the coil. I've been using Steam Engine to help me with the number of wraps and have played around with the numbers. I like to use 26 gauge kanthal as it gives me the ramp up time I like with a dual coil build. I typically run between .3 - .4 ohms at around 45 - 50w. This weekend I wanted to make a build on my rda that was closer to .3 ohms. According to Steam Engine, that was about 6 wraps or so at a 2.0mm diameter. My thought was "hey I should try to get more wraps in for more surface area" so I shrunk up the diameter to 1.5mm. That gave me about 7 wraps or so to play around with. I noticed however that I had to cut my wicks thinner. My question is, does diameter matter when it comes to the coils? And does surface area matter? I'm using a mutation x v4 as my rda. I think I've hit my sweet spot, but if I could be doing something better (without getting all fancy with a wrapped coil), I'm all ears! If diameter doesn't really matter, nor does surface area, I might just stick with the 5 - 6 wrap 2.0mm diameter coils.