Ammeter disassembly

Well, I managed to locate what is the adjustment for the needle. It's a tiny sort of cam lobe behind the needle and only accessible from the bottom. It's a very intricate part, and it has to be done with extreme care due to the location of the copper winding. I managed to trim enough of the backing to allow the gauge face to stop contacting the gauge needle. All in all, it was a painstaking process, but it looks good and is functional.