Anyone else had the experience of changing RDAs with only a small resistance change eg. 0.6 -> 0.7, but the screen stays on 0.6 after pushing the button? A couple of times I've had to unscrew the rda and hit the button to show x.xxohm, and then rescrew it and hit the button again before it shows the correct resistance. This doesn't seem to happen if the resistance change is >0.1ohm. Definitely not a big problem, but hey I'm clutching at straws trying to find something wrong with this mod.