I realised something tonight. When I made my cheeks I pretty much copied the Pro Modular design (thanks!) and made them sloping about 30 degrees.
I'd taken the ones off my MnM to give the edges a bit of a file and polish (they were my first set and we not quite as good as my red OT ones).
I hadn't put them back on until tonight. Distracted by the cat and a bit absent mindedly I put them on the 'wrong way' and to my surprise, they worked except the angle is now more like 60 degrees. Effectively you can have two (radically) different angles depending on how you fix the cheeks to the unit!
I'm pretty sure you could do the same with the Pro Modular ones.