The pitch effect of sweep is due to the the larger chord part getting into chord dominated GE first. since your 1/4 chord line is swept forward I'd expect it to pitch down but it should be a very small and slow change that can be easily trimmed out by the pilot. Hmm... That would mean pulling back more. One more little detail to keep track of in order to avoid bouncing those landings If you can find data on how much lift increases relative to hight in chord dominated GE you could figure out the additional pitching moment due to GE by figuring the hight above the surface and the lift increase at a few span wise locations with their longitudinal distance from the CG I know you don't like hearing this but I think you're obsessing over significant digits. Remember back in the days of slide rulles they lopped off most numbers after three decimal places because anything beyond that just adds to the computation time without improving accuracy that much. Yeah, it left some unknowns but the planes usually got through their test programs without killing the test pilot. If you don't drop the significant digits you'll be looking at some expensive computer time.