String that link you posted was very interesting. When I bought my ex rally EG6 late last year I was a bit disappointed that there was no external adjustment facility for the shocks.The constructor of the car said that he had developed the suspension over 10 years and 18 rallies in conjunction with the shock/ spring supplier (Joe Wilson of Heritage Motorsport) and for various technical reasons no external adjustment facility was ever contemplated. I think he said it took 3 or 4 attempts at a setup before he felt it was "right". I have adjustable Konis on my other competition car (a Swift GTI) and I have found the best way to get somewhere near what I want is to send them back to Koni for a rebuild/revalve. The external adjustment facility has never inspired me with confidence. I guess it all depends on what you pay and what you are planning to do with your car. The setup on my Honda would cost I believe somewhere around 7 or 8 grand to replicate although this is still cheap compared to what some people will pay. If you look at the Brindabella car club web pages you will find a discussion there on the "best" shocks . Someone speaks very highly of Ohlins that cost around 20 grand and have to be sent back to the supplier for a freshen up every two events !
Steve