There are some pigstickers available locally, and I believe they're French made from around 1900. I'm interested in them, but I thought they should be the same thickness from front to back. For instance, if it's a 1/4" chisel, should it be 1/4" thick all the way. These taper from the back of the chisel to the face, which seems to me it would jam in the material, plus it wouldn't clean the mortise sides as well.
I have several Sorby sash mortise chisels, and they're the same thickness which helps remove the waste on the sides, and they leave a cleaner side. I've never had any pigstickers and would like to get some, but want to get good ones.
Thanks.