So I've swappped scopes sat on my home made pier and mounted up my new 14" Netwonian for the first time. The pier is hollow steel bolted to the floor and filled with kiln dried sand. I had my RASA11 mounted before and it was reasonably solid but I noticed today that the newt shook a fair bit after I manually moved it and the vibrations took a second or two to fully die down. I don't know if it's always been present and the extra mass (about another 15Kg) or the length of the scope that makes this more evident. Anyway with the RASA on I had noticed that even though the scope seemed solid the guiding detected if I was clomping around the observatory but since I rarely did I just put up with it, after all the scope was imaging unattended 95% of the time so no worries. That said I'd like to tame things a little. Any practical ideas? In order of ease (and therefore preference) I've heard that adding oil to the sand helps; other things I'm considering are casting a concrete sleeve around it, building up brickwork around it, or having some stabiliszing fins welded on. Has anyone experiencd similar and how did you cure it? Many thanks