As part of upgrading my hand tools, I splashed out and bought a Veritas large router plane. I very much like it and the results I get from it. However, one thing bugs me. Unlike the Lee-Neilson router plane, the blade on the Veritas is removable so that it may be sharpened with the help of a jig which Veritas supply. The blade is attached to the stem by a small screw undone with an allen key. I find that, having sharpened the blade and re-fitted it, when I use the plane the screw works loose irrespective of how hard I try to lock it down. Do others have this problem?