Yesterday I was trying to rescale an old Sheffield but the horn blanks I had were pretty thin (2-2,5mm) although I was hoping the horn would be sturdy enough it turned out it probably was too thin, was flexing more than I would like to, so before proceeding I thought I'd try to to layer horn with a 0,5 mm (0,2 inch) brass sheet (as UKRob did with Filarmonica and copper)
http://straightrazorpalace.com/custo...larmonica.html

What I'd like to know is, how do you do this, I was thinking of using epoxy based glue, but am a little concerned how is this going to affect the flexibility (2 layers glued together). Is gluing the rough parts and finishing towards the final form a good idea? Do you by any chance try to pre-flex scales a little bit prior to/while gluing?

thanks