Back in the 1970's I solved
the problem of keeping sets of plow plane cutters together,
organized, and protected from humidity.
I made a shallow dovetailed box with a sliding lid and an
interior rack for my cutters.
In order to lock the cutters in their respective slots I made a
sliding restraint bar consisting of a little board that slides
in grooves on both sides of the box's interior.
The plow cutters are slightly inclined from the cutting end to
the back so that when the little board is slid back in the
grooves it comes to bear on the cutters and locks them in place.
This photo shows how the sliding bar is engaged in grooves at
either end. It is slid toward the cutting edges to release the
tension on the cutters. I had found my first English chariot
plane at the time and I commemorated it in the little relief
carving on the bar.
This photo illustrates the box ,with its lid slid back and the
restrained in their slots. The absent cutter stays in one of my
plows set to use.
This photo shows the cross bar slid free of its grooves.