I understood that all pads rely on a combination of adhesion and abrasion. The weighting changes with pad composition, but both are in play.

Did the supplier tech advise the heat saturation limits of their rotor design, with and without drilling (ie, with and without the effects of the reduced thermal mass)?

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue