Just got back from weekend away in the GTD, over 300 miles, M4, A34, Aylesbury, Bedford etc, as you can see on all types of roads and surfaces, with the ACC set to comfort ride still seems a tad hard and choppy [against Mk5 GT140D] on 18" Vancouvers.............would ride be improved if I fitted the standard 17" wheels ? anyone had experience of both on a GTD?