Front upright geometry

[graeme.webb1@ntlworld.com]

Hi, need some help. I am looking at using BMW (or something else if I cant get the geometry right) front uprights instead of the books Sierra ones. As I would like to keep the suspention geometry (roll centres etc) the same as Chris Gibbs design can any one let me have a drawing of a sierra upright so that I can make sure that the new upright will be OK. I am prepared to modify the upright to suit.

AS the wishbones are already made I do not want to remake them.

Hope this makes sense

Cheers

Graeme