You’re an absolute star, thank you. I’ll check later it’s good to know i can get them now.these are on amazon. don't know if that will help.
I’ll have a try at this i think? I can’t remember exactly what batteries I bought? But to be fair, one of mine ( the one I changed the battery in ) isn’t miles out either?I replaced mine with a Duracell and the calculations were way off. Calibrated at several points and it was never accurate.
I replaced it with the Panasonic Cr123a and it was a bit better but still not there.
I then took the shuttle out again and pushed it in just enough to be able to get the cap to catch the thread then tightened it at which point it pushed the shuttle up ever so slightly.
It’s now almost bang on, never more than 0.001 out on the uncalibrated value and that’s the same as a hydrometer reading.