Much more important in pier design is to reduce vibration and ringing in the mount. My design does still suffer from this when heavy vehicles go past the house (the road is some 80 feet away). This can induce a wobble of up to ?? arcseconds which takes about 5 to 10 seconds to die away. In practice this should not present too much of a problem since traffic is occasional during observing sessions and only long exposure CCD images would be affected.  Following installation the pier was filled with sand to reduce vibration but I never found much evidence that this actually helped!