Hi,
Anyone else having nightmares callibrating an ispindel?
I managed to get 25 degree angle in clear water. took it out to charged, checked again … 32 degrees 
Trimmed it again, got at 26 degrees. took it out to charged, checked again … floating at 15 degrees
anyone whogot it callibrated an it stayed in balance over time? (if so, HOW did you manage that ?? )
I must be naive… I had to go look WTH this is… Its a DIY-ers Tilt…
I suppose the more you tinker with it… the more familiar you’ll become… I’m no help… 
Sneezles61
I use Tilt electronic hydrometers. I’ve never needed to calibrate them but I did give one of my old ones to a friend… who then calibrated it… and it’s no longer accurate. So I believe you.
This seems pretty good info
