Really like this thread, learning quite a bit. Didn't VAC cover sleeved engines in detail in a different forum? I think I saw a sleeved S65 and the walls between the cylinders were super thin (before the sleeves). The workmanship seemed to be top notch. Not an expert on this stuff.
2015 F34 328iX GT Glacier Silver
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red