[Startrek (Martin)]

I’ve been using PHD2 guiding ( Ascom pulse guiding , not ST4 ) for nearly 4 years now at two different sites and the last time I performed a calibration at both sites was nearly a year ago. I use the Auto Restore Calibration function in PHD2 which is a real time saver.
Both rigs have the guide scope and it’s guide camera fixed on a Losmandy bar across the tube rings so I can pull the whole OTA off the mount with guiding gear ( down south in my NexDome the rig stays put whilst in Sydney I collapse my rig twice or three times a year and bring it inside ) and calibration is not affected.
If I had to calibrate at both sites every time I imaged, the additional hours would certainly add up over a year.
When I first used Auto Restore Calibration I was expecting to re calibrate after a month or so , but just kept using it ( without any issues ) until I realised after nearly a year I haven’t calibrated this rig for a long long time.
For those who use PHD2 ( Ascom Pulse Guiding ) , do you take advantage of the Auto Restore function and how long have you used a good calibration for ?
Thanks .....