My 2005 roadster came with wooden spacers. I took them out as my eyeline was at the top of the screen. It wasn't easy to refit the seats without the wooden runners though...some bolts stick out and also I think the seat doesn't go quite as far back now as the seat can't ride over the front end of the rear suspension. My point is (I'm getting there slowly) that mmc must have changed the seat frame when they stopped using wooden runners....so Dave I'm afraid it's up to you to take a seat out of each of your TWO Morgans and show us the pictures...........
Nick