Not much different than a rigid post. The Seaspension pedestal is made strong enough to absorb lateral loads. In fact, we did something unique when we engineered the Post, in that we urethane bonded the inner tube to the base casting. This provides for a small measure of horizontal shock-absorbency. Standard rigid pedestals are normally swedged in the casting, where they force-expand the tube into the base to lock it in. This actually provides a weak area, as the metal is stretched out near the neck of the base casting. In the case of rigid pedestals, this is normally not an issue because no one wants to sit on a rigid pedestal when the pounding gets bad, but we wanted people to sit, rather than take the pounding through the legs.
We have also prototyped an off-set wedge, which mounts underneath the pedestal (same footprint), and projects the pedestal at a forward angle. We haven't had much call for it as we don't really promote it, so it sits in the shop as 'just another great idea that didn't go anywhere' :wink: . The thought behind that one however, was to get your derriere against the seat pad, and when shock load forces your body down and back, it compresses the pedestal through the shock-damper (so you don't get a hard poke in the you know what). It takes a slightly lighter coil-over spring to make it all work, because ideally you are spreading the load out over your legs and seat. It was mostly designed for those guys who just don't sit down, and want to lean against something that would give instead of being rigid. I can send some pictures if you are interested, or maybe want to sign up to use in a seatrial. Just let me know. Thanks.