I was asking because we reduce the props and then retract the flaps but the book says flaps first then props. We are operating at higher altitudes with lots of hill and we find that leaving flaps set at 10 after take off we get a better angle of climb to clear obstacles. The other reason is that if we lost an engine while reducing power after take off then flaps 10 were already set minimising EFATO procedures. I have heard arguments to retract the flaps straight away to accelerate the aircraft but accelerate to 100KIAS from 90KIAS seems a bit pointless for initail climb out.