Chris
Thanks for your reply.
I had the CG set in the way you describe. From your video looks like you have some flat calm days in the USA. They are few and far between in the UK! I think with the strong winds it just made the landing extremely difficult as it rocked about. At the time we did wonder if the plane might have flown better upside down as it was so keen to flip over. There is no doubt it is a pretty plane especially the white and red NASA scheme so its as all the more upsetting to lose it. It was a long time ago now and I have made many more planes since. The best flying plane I have made so far is a flying wing with no fin and no rudders and just ailerons for control!
John