I hope this helps with using a #75. The Rodney Dangerfield of planes. The photo shoul help. I first grabbed a scrap drilled a 1/4” hole and glued in a dowel, store bought dowel didn’t match the hole well. I used a flush cutting saw with a spacer to cut the dowel. The dowel was a little higher than the nose of the plane. When cutting the nose of the plane will ride up on the higher dowel so it doesn’t try to take a bite too big for it to handle. The next cuts will bring it down to flush. If properly set the background is not touched. I put a bench dog with a light behind. You can see the reflection off of the dog spring but no light under. I would like to think this explains some of the misconceptions about this very handy tool.