I'd be interested in knowing such seat angles. Some quick tests for seating options for me seemed to produce more upright seating than I have seen in diagrams of gliders.Vince, the nearly prone seating position shown in your photos is going to prevent you from getting any enjoyment out of the aircraft. It would be like the "Bally Bomber" B-17 replica that flew, but not well enough to enjoy and keep.
That would be a crying shame for your 262, same as it is for the Bally Bomber.
I very very strongly suggest that you measure the pilot seat angles and dimensions in a single seat racing sailplane (Ventus, AS-W20, LS-6, etc.) and scale up your 262 replica to allow that seating position to fit. The racing gliders are a very good balance between smallest usable size (to achieve minimum drag) and pilot comfort/ergonomics (cross country glider flights last up to 8 hours).