Resolution to Plow Plane Issue

A couple weeks ago I presented a problem I was having with my wooden plow plane, especially when trying to plow a groove in end grain.Right side of the plow, showing skates and ironA closer pic of the skates and ironAfter a bit or playing around and then noodling about it for a while, I realized that the underlying problem was that the iron(s) were not well supported by the skate.On this 3/16" iron, I was able to slip a couple thicknesses of paper between iron and skateLet's step back a moment. The lower portion of the front edge of the rear skate has a 90° V-shape that is supposed to fit into the V-shaped groove on the underside of the iron. But I had gaps there with some of my irons.The front edge of the rear skate, between the green arrows, protrudesa little further than the upper edge and has a V-shaped edge.The yellow arrow points to where the heel of the iron's bevel rests.Here's a typical iron's groove. The pencil points to the spot that mateswith the uppermost part of the…