My favourite no. 3 recently broke, so I purchased another to replace it. I was using a Lee Valley replacement blade and chipbreaker, and fitted in the new plane, I can barely advance the blade enough to make a cut. The depth adjustment knob is right at the end of its screw, and the plane will just take the lightest of cuts. My thought is that the blade set is too thick for the plane as configured, so I'm wondering if anyone has an idea how I might get a little more room for adjustment. The frog is set almost as far forward as it will go, and I even had to file the mouth a bit to get it to work at all.

Any advice would be appreciated!