just done some measuring up, on the focus rs brembo, from the end of the pad to the outer edge of the caliper is about 20mm with 50mm pad sweep / depth

on the fook off caliper its about the same but its a 60mm pad depth

so theoretically the only thing that would stop it bein fitted is the pad depth re overhang as the distance from edge of pad to furthest part of caliper is the same on both of them

os overhang is no good then ? lol