I have a SPG Racer with the thick (55mm) seat pad. Headroom is an issue for me and I'd be interested to see if there is anyone out there with a recent model SPG or SPA who has the thing (25mm) seat cushion and might be interested in a trade. If the seat of your RECARO is essentially flat, then you have the one I'm looking for - a long shot but the $100 it costs for a new one is a great motivator...

K