Hi Hans,
I have been using a pier mount for 25+ years and although they are a bit more work to set up they are quite unmovable when put on site. I never have to worry that my crazy dogs might knock it over at night and it has been great to use at school veiwing nights. My scope is an 8" f6 with a 4" finderscope (guidescope). I can wheel it out of the shed and down the concrete path no problems. I can fit the pier in the boot of a 1995 lancer and the scope on the back seat. The legs are attatched with wingnuts from the inside of the pier tube. I have seen a similar mount with a 16" f 4.5 newtonian on top. Stable....yes to the max.
Cheers Rick
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