Hi Pip, I play cornet in a brass band. I went back about 6 weeks post op as I was worried about blowing, as you know it comes from the diaphragm which is directly above the stomach. The first rehearsal I felt a bit achy around the tummy but I took it easy and didn't blow too hard or play high notes! Now things are fine, not much different than before the op. I reckon I don't get out of breath as much as before and we did a march on sunday and that was much much better. Still got a bit out of breath but no where near as much as before! I reckon you could go back soon, try your flute out at home forst and see how you go. Good luck!