Thanks Don, will re-calibrate again, and Dale thanks for the tyre pressure tip- will try the higher pressures.
My SegSeat is an earlier version (see attached image). I find this seat quite good to use, comfortable, easily adjustable. I am not really able to compate its characteristics and quality to other seats because this is the only one I have used. Use it intermittantly and am expecting to use it with golf configuration but have not done so yet.