Hi Roo,
I had the non-pier version and it worked fine, but I did end up buying a pier extension for it as well - my 102mm f7 refractor would get too close to the legs at times. But I found it too long and yes, slightly less stable, mainly due to the centre of gravity being so much higher. I actually purchased some 3mm aluminium tube I was going to use to make a shorter version but never got around to doing it before selling the mount.
I think someone like Jonathan may be better to talk about stability of the pier version as he has one. But I can't see it being too big an issue.
Cheers,
Mark
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