http://www.thestuarts.freeserve.co.uk/page3y.htm
Just realised that this model is not blue foam construction as I originally stated but conventional balsa/tissue,my informant will be shot at dawn ! the direct link to the page is above,thanks Kiwi for bringing the additional info to our attention.
Good to see this type of modelling on the increase,the finish on these models is a credit to the builders considering that weight saving is the essence of getting them flying successfully,notice that the props are handed so eliminating torque effect.
A piece of art in its own right.