not your 3 meter dish then Pinocchio ???
Pole is fine but why not Disecq motor ??
the actuator is obviously adding more stress and weight and keeping dish further to exposed high winds
a small dish like that will shake like it has epilepsy , the very least you can do is move it all further down the pole 15 inches
you have still plenty of room to move down dish and Arm a lot more ,
T & K Brackets is preferred option but what you already have is not an issue since its double clamped .
Adding thicker pole still not gonna change as lot IMHO
Ground mounted dishes are not troubled by any sort of wind ....and on top of that its not a mission to climb up ladders and make any adjustments when ground mounted you can have any issue fixed in a moment regardless of weather .
@
kegnkiwi is 100%