Gutsibits' windage plate turned up toute sweet ( yes it's a copy of the Roper sloppage plate, but I sent Pete some beer coupons after I found out it wasn't his ), it appears to be laser cut stainless steel, a very slight scorch around the holes.
Most of the holes have a weird micro fibrous stuff on them around part of the circumference. It could be paper fibres scraped onto it but looks more like spider silk, gums up in my finger, strange strange stuff. Any ideas?