Hi Martin,
The force of that gale that day was absolutely frightening..... even with the 2.2 lowered lower than horizontal with the Cband feed digging into the ground , roped down from the dish arms back to the base of the mount, the wind still managed to get under the dish face and whip the dish back up to vertical and slam it against the mount structure with horrendous speed, hence the bent metal work and trashed motor. The lower part of the support is 6"x6" box section on a 26" square base plate that is fixed with 25mm threaded rod going down about 24" into the concrete base which is a 1 metre cube of concrete. That little lot never budged an inch, but the top section did and i think i will re-design that bit better to allow for the extra weight of a CM. I was very very lucky to get the dish back down to horizontal whilst the gale was blowing, it took two of us to get it down whilst there was a slight lull in the gale. I can remember thinking .. "never again" , i was so lucky it didn't cause more damage.
I'm only down the road a bit from you Martin, near to Center Parcs Sherwood, wouldn't mind a gander at yours in the flesh at some time if that would be ok ?.