This whole discussion on MMG placement is really interesting. I will try out all your suggestions as I go along, using the Cardas formulae as a starting point. I have a question though: when you talk about distances from the side wall, are you talking about the geometric centre of the speaker, the centre of the woofer or the centre of the tweeter? This question never arose with my old Dynaudios, because the tweeters and woofers were aligned in the vertical plane.

By the way, I discovered that my stock MMG stands were a little wobbly and used aluminium washers to ensure the screws were tight. It made an audible difference.