the problem is things like danes were made on the car, so nothing is jigged its made at the time, so to replicate it without a car is not possible without a huge margin of error..
there's an s3 in here currently which we fitted a supplied AH v2 fmic to, and we had to adapt some of the supplied hoses to make it fit.. but nothing required welding other than fixings AHs usual **** up of sticking the support brackets on the wrong side.