I have one of these and it won't work at all as in scraping anything but fresh air. I had a bit of a look around the web & on YT and it appears to be sharpened correctly at 45 degrees with a hook and if I pull the blade out I can use it by hand. I set the blade by putting the plane on a flat surface and letting the blade contact the surface before tightening the clamp screw. Any pointers as to what I am doing wrong greatly appreciated as it is such a simple plane it is hard to see what I am doing wrong.