I stretched the threads so badly that a tank would barely stay on! Mine was one of the early versions that had the dreaded ....-eyed connector issue, so I always backed-off the top cap to force the tank straight, and in doing so, I really put a hurtin' on those little brass threads. After I got some replacements I modified one of them and now I can proudly say that my tanks all fit flush and straight! (I should've sent the whole thing back when I first got it)
How did you modify the replacement? My tanks all sit a little high/unstable too and wondering if replacing the threads may improve it? I also have one of the first batch.