Thanks again Lanner
I want to stick with my 15's (Fuch), very interesting info regarding the Boxster callipers, thanks.
Interestingly when I was trawling though the samba I stumbed accros this advert:
http://www.thesamba.com/vw/classifie...php?id=1188283.
Seems to be 944NA hubs rotors with Turbo calipers (advertised as allowing 15" wheels) - I guess it is a bodge?