I decided to stop obsessively over thinking whether or not I should keep or exchange my new LN infill shoulder plane. So when I go home tonight I put a hollow grind in the blade, honed it 1k, 6k 10k, put it back in the plane and went to work. Problem is, when I take a cut the blade keeps pushing back and the wedge comes loose. LN says not to hammer the wedge in, but I did seat it with a lot firm palm pressure as they suggest. I double checked the blade, it was sharp, but I rehoned it anyway. I then checked the wedge - the surface of the wedge that meets the blade has visible twist in it. Is this what is causing my problem? I'll call LN tomorrow and see what they say, but I thought I'd see what you folks thought first?