I think I've decided to have one 'big' MM chapter - I say big, but in reality many of the techniques are more or less the same. I have 3 results chapters, and will order the MM in order of the techniques used in each and if I have something in results chapter 3 that is similar to chapter 1, I think I'll say something like, X was conducted as described (refer to earlier thingy), modified by the omission/addition..... etc.