For #2, there is a company, maybe AeroData, that derives this data. I went a few rounds with HBC on getting it for the 200 and 58 (so we could have legal data) but they didn't want to touch that with a 10ft pole. I think the benefit from the approach flaps is that is does generate more lift and allows you to safety operate at a lower airspeed (Vref) than Flaps 0.