Snoopy1
640cc Uber Pimp
I will try to explain working on glass is a totally different approach to building. Pins and T pins are not used. First of all you will need to understand that this how I do it and I am sure there are many ways to skin a cat. I build with stainless steel blocks and very large roller bearing rollers. Now if I am building a wing the main spar I will glue the ends to the glass with tiny drop of CA and then put few weights on top of the spar at strategic locations. Note the drawing is under the glass. Then I will place the ribs on the spar and place the square blocks on either side of the rib to hold it square. And to hold the ribs down I will place strip of wood across the top of the ribs and then place a few weight on it to hold everything down straight and square. The blocks are 2 by 3 by 1 inch and the rollers are about 1 inch round and 1 inch long. And a couple of lead shot bags. With everything set and checked then everything is glued. Note to disconnect the spar from the glass I take one of the steel blocks and just side the block over the glass into the side of the spar and it just knocks it lose. Added two pictures to see the blocks. If you have anymore questions please ask.