All the instructions I see for shielding pickup and control cavities involve cutting foil sheets to fit the cavity bottom, then cutting separate strips for the sides and then soldering to achieve electrical continuity. Is there some reason why the foil isn't formed to fit both the sides and bottom in one continuous piece to eliminate the need for soldering the shield sides to the the bottom? What am I missing here?
the outside would require numerous cut be made and the pieces could overlap, when bent upward.
The first one I did was like that, using thick foil, on a 'blob' shaped cavity.
I made a cardboard template of the cavity base, then copied that onto foil and drew another curve outside of it by a distance equal to the cavity depth. Then I sliced this outer zone radially at about 1" centres. The sides were then bent up and joined at the top and the whole thing could fold down into the cavity, in one electrically continuous piece. I did it that way because I was using thick Al foil and cant solder it. The 'strip' and 'base' method with copper is probably better.
Thanks for the comments. Now that I have started with some heavy copper foil, I understand the problem of curves. Turns out at least with an old style strat body pickup rout pattern, seperate bottom and side peices result in the least work and fitting.