Hand Tools Archive
Very cool! That’s an amazing big chunk of lignum. Maybe you have enough left over for a mallet? Please let us know how the plane works as you refine it.
One thing you might do is check the fit of the wedge to the blade. You want the wedge slightly sprung, so that it is focusing pressure on the iron at two places—at the top of the bed and down near the cutting edge. This is easily done by lightly scraping the underside of the wedge—in the middle, only—until you can just see a sliver of daylight in the middle when you put a straightedge down its length.
Try the underside of the wedge with a straightedge—it may already be that way. You want the underside to have just a hair of concavity. If it’s convex under there, the plane won’t work right.