Thanks for al the useful suggestions. I think I will abandon the Rev 1 frame, perhaps the sail is just that bit too big and try for a travel frame on my 1.5 SLE a la Bob using P300. If I do find some off cuts and I try the Rev1 idea I'll post a rely to let you know how it goes.
I have just checked on BBC iPlayer and the Blue Peter seems to be available for down load. Watching the first few minutes covers the Kite Festival but still waiting for the rest ot down load to see if it is the complete version.