Stainless "Works" - Tools - Bridge City Tool Works [Here is an idea that could be applied to nearly any Krenov plane; any plane having parallel sides. The side rails could easily be made using wood and a router; use just 1 rail for edge jointing]
Particularly planes in the Krenov style although James would not be happy with all the curvy shapes I add.
Woodworkers know chisels and plane blades perform best and are easiest to use when the business end is square to the sides of the blade. The Edge Tool Sharpening Gauge starts with a built-in square that’s more precise than most other commonly available shop squares.