Narrowed IRS

[65Cabby]

Has anyone fitted one (or two ) of these narrowed IRS arms

http://www.aircooled.net/new-bin/vie...yword2=DRS0007
aka
BlindChicken
http://www.blindchickenracing.com/Pr...sion_parts.htm

I'm currently running 944 steel arms with vented disks, the big 4 pot calipers sit wider then the face of the disk. I have some cup2's which are 55 offset and fit spot on but I want the option to run earlier wheels. So if a spacer is used to clear the caliper then the track needs to be narrowed.

Also if anyone has narrowed the existing arms where did you get it done (UK based).

Cheers
Richard