Originally posted by aslyfox any thoughts ?
As expected. There is no electronic communication other than statically signalling the available aperture range for A-lenses.
I'd recommend to set some focal length in the middle of the zoom range for SR, something unique, which no other of your A-lenses has, so you'll at least be able to tell your A-lenses apart by looking at the EXIF data.
Which focal length depends on you use. Setting it to a short value makes SR effective for the short range and leaves the long one highly under-stabilized. Setting it too long will 'overcompensate' the shake for shorter FLs. On your 3x 70-210 zoom, assume you could set it to 140mm for easier math. In this case, 70mm would be overcompensated by a factor of 2, i.e. shake will be as bad as without SR, just the opposite direction. SR gradually getting better as you zoom in, perfect at 140mm, going to the long end still at 2/3 of the required compensation, where it is most needed. So for general use, I'd pick either 135mm or 150mm, tending to 150mm, because I do have 135mm primes as well. So as a genera rule, setting about twice the minimum FL avoids making it worse anywhere, while maximizing the benefits in the entire range under that constraint and may allow to tell your lenses apart from the recorded data later if this setting is unique in your stable.
If you however have a shooting situation where you mainly use the zoom lens for its reach, set it so something longer. Shake at short FL will then almost be as bad as 210mm unstabilized (2/3 of its magnitude if set to 210mm), but SR can quickly be turned off on the info screen.