Replacement discs/pads - AP

[Pip1968]

I think my front discs are on their way out as after my last track days at the Nordschleife there seems to be a lot of small cracks around the drilled holes (I will post up some pictures when I get back home). Furthermore my pads seem to be down to the last 7mm of meat left - presumably dangerously close to the rivets that holds the material in place. What is the cut off mark/thickness on RS29s?

I have DS5000 for normal road use and RS29s for track only and run a full AP Racing set up.

Anyway what are most using for replacement discs with AP? I take it AP discs still have a bad reputation - is anyone running AP disc (and tracking their car). Aside from that what else is there - PF discs - £475 (??)/ AP/ BMW OEM/ Alcon (or does this require other replacement parts???? I take it grooved is the way to go now.

Finally if you have any tips any pointers as to where best prices/ sourcing will be appreciated. No rush as I am away until August and not tracking the CSL for a while. It is the GT3's turn .

Pip