Thanks, I'm glad you like the plate. I was concerned about flatness "across" the plate, parallel to the hinge. I considered fly cutting the surface once it was bolted together but, when I checked, it wasn't that far out. I think it was about .005-.010 across the whole plate. Not enough (for me) to be concerned with. Someone who does very accurate machining may want to dial it in closer but I am just a hack and it works well for the stuff I do.
Setting the plate angle with a digital protractor gets it pretty dang close.