My lady has an El Kapitan, and it is by far the worst designed mod I have used. If you lock and unlock the ring a few times the bottom button slips off, and the V1 do not really have adjustable screws.
Most legit mods have an enormous mark-up and force supply down and do limited addition runs to falsely keep costs up. I have no sympathy for companies that try to control the market, they brought the clone situation upon themselves.