Does anyone use one of these I used to use the Anton spint but now have the Kane 455. Had to use it for a tightness test as needed to leave proof of a passed test but when I did it the gauge was all over the place then once i finally got the gauge set and started the test it went ballistic! I did five tests one as set by Kane then I changed to a dampened response then high/low resolve and got a different outcome every time some times the let by was up then it was down then it passed but the tightness was all over the place. At its worst there was a 4 mbar difference yet use the water gauge and everything was fine doubting my self I turned it of sat in the van had a cuppa and tried again with the wet gauge and perfect again. So my question is this am I missing something or is my 2 day old analyser an expensive paper weight? I appreciate it's not the best but had read some great reviews on them