FWIW, I use a wedge pack in an S-1S, also hoping for a bit of a seat back recline effect. The effect, for me, at 6’ 2” is almost non-existant. Were I to look for a different parachute, I would look for a flat that would pack thinner that the wedge does.
I should have clarified that there is enough room for a wedge of foam about 2 1/2” thick at the bottom tapering to nothing. This and the wedge pack gives some recline / lumber support. Feels a lot more comfortable than the original seat position and I think the sight picture being lower in the cockpit is better. Feels nicer IMO being in it rather than perched on it too.