I read this article and enjoyed it, since so many moms here have dealt with oversupply. I've definitely heard Kathy mention this approach on this board too. It's a long article to post all of it here but read it if you can!
Overabundant milk supply is an often under-diagnosed condition in otherwise healthy lactating women. Full drainage and "block feeding" offer an adequate and userfriendly way to normalize milk production and treat symptoms in both mother and child.