When I built My +8 Bitsa I needed rear wings. Lorne Goldman sent Me His old front wings. I was able to get one rear wing from a Local Friend (new) for $50, but that left Me with one to get. I had a +4 rear wing that I added metal to but that was a bodge. Cuthbert Twillie lent Me Molds for +4 rear wings. It looked like I would be able to modify these molds for a +8. It never got done as I felt the cost/time/uncertainty was too much. So I bought a rear wing from Uncle Mel. Rutter's price was not too prohibitive but the cost of air freight to Seattle was huge. It made Me wish I had spent more time on Glas Rear Wings.
Just because I have the rear wing molds that Cuthbert Twillie made I got them out as well as a couple of spare (well used) steel ones. It became obvious that much care and craftsmanship must go into these molds if You are going to get the results that Tim got. Not to fault Cuthbert, His project did not require replacing the wings. His project was a bit different. But to get the results that Tim got required molds that were very accurate and rigid. The rear wings are a bit floppy. But magnify the front wings by about a factor of 10, It looks to Me that the wing that was used to make the mold had to be perfect. and then support welded inside the wing to keep it rigid while the mold was made. I have no idea how much Tim paid for those wings. But I bet they were worth every penny (shilling).
