Yes GMayberry, you're absolutely right!! At first I thought it was just my mind playing tricks on me. There I was thinking.....
"Wait a minute, I thought that coil was at 1.1 ohms, not 1.2." And then a while later..... "Huh? I thought it was at 1.2. Now it's at 1.1 again????"
It happens quite regularly but it doesn't seem to affect performance. I guess if it's truly only 0.1 ohms off it's no big deal but I'm glad you mentioned it. I thought it was just an anomaly with mine.
As for the screw on the 510 connector, no, it shouldn't be loose. Having said that, I found that mine is a bit loose as well when it is not fully screwed down. But it is quite stable and solid when it is completely screwed down. So I just keep it like that. No connection or contact problems with any of my tanks or drippers.
First of all, 1.1 jumping to 1.2 and back wouldn't make me question anything. lol I mean 1.1, to 2.3, back to 1.7, up to 3.0, back to 1.1, etc etc. And the screw seems to have fixed this. However, I loosened it up so it sits higher and it apparently is making solid contact now. When screwed down tight, it didn't make contact at all. Since doing this, it has registered .9Ω consistantly since yesterday evening. Using a Stillare clone btw.