Thanks Dennis, I did read your experiment before posting and it is very well done, and shows that there are certainly improvements to be had.
Whilst the VPS units work, they are so short in life that I have to lift the mount and replace at $80 each time, wasting time with polar alignment all over again.
Also, I am not overly concerned with something physically touching/hitting the mount, mainly vibrations from cars/trucks on the road next to the observatory, (less than 20mtrs away).
I will replace the Meade pads with the Bunnings rubber pads and report back if they have done the trick.
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