Roger.
Totally delighted to hear from you. I had hoped we might hook up some time.
(Late edit) Contact now established between us. Most useful.
In short, I think your involvement and that of Rob Lewis saved the day as for as the Dr1 is concerned. It was obvious the incidence of the top wing was incorrect and you both came up with a solution which might otherwise have eluded us for many a long month.
George has also seen this thread which he read with interest. A link to it was also sent to DW for their information and perusal. It must of hit the spot down there in China, be