I spent quite a bit of time when we were in hospital with a girl who had a breast reduction as both our bubs were in the SCN and our feeding times co-incided. Her little girl had been very prem and was being breastfed 3 x each day plus EBM the rest. She had her reduction (about the same as yours from memory) after DS 1 and was then told at Knox that she wouldn't be able to feed DS 2 due to the reduction. The staff at the Royal Women's and Mitcham got her going straight away and she was having no problems with DD despite all the difficulties/stress with her being prem and still in the SCN 6 weeks after her birth.

Good luck!