Hi Willy - that was built by my good friend Derek (Lee) Waghorn.
I watched this grow from the back of an envelope (yes really) over many years. The (Mecano) parts are mainly fibre glass including the dummy nuts and bolts and were all 'distressed' by his wife Sali.
I have other pics of various parts but that will have to wait until later if anyone wants to see them - I'm now off to Downham for the day
Regards Tug