I’ve been looking at RTA and the FEV 4.5 got my attention.I tried a few searches on the forum for a thread on flash e 4.5 but couldn’t find one.I found some older that were closed. Many of the reviewers on YouTube that I prefer all say it does every type of vape draw from tight MTL to a loose DL. I have kf and a few other flavor tanks and bf RDA but I have not tried the interchangeable insert under the coil types of air flow. I’m also looking at Tripod,Brunhilde,and a few others but the flash e might be a better choice. I thought I’d ask if there are any flash e 4.5 users and their opinions.