Simon, never ever thought of doing portriat for pano's, great idea, thanks.  However using my tripod would give the problems 3DGuy has stated. The bracket, if I made one, would have to be some 300mm long, because of the type of head I use (quick grip ball, ball to head plate 250mm), to long!!

Another way would be to tie a string around the lens against the camera body with a small weight and mark the floor with chalk, and move the tripod on every shot to the same mark, but this would only work well if you were on flat ground I suppose.

Ah, or even better, use the flash shoe to tie the string as this is just in line with the sensor in the camera, sorry typing whilst thinking about. I'll shut up now.

That's it, of to experiment.

Steve