I seem to be having a problem when I start the cut on a piece of wood. I put the front of the plane down and hold it tight to the surface of the wood and then push the plane forward with downward presure. As I get the blade to the wood it seems to jump a bit and skips over about the first 1/4 to 1/2 inch and then starts the cut and cuts a nice shaving off. But i have a bump at the start now and I dont know what is causing this. Is there something on the plane that I need to tune or is there something wrong with the operator. Any help would be great as I am a new user of plans and this is a bit frustrating. The plane I am using is a #5 look alike that my father had it is a Sears Craftsman and I have worked the blade and breaker like Dave C video says and I have check the sole and it seems to be flat within .001 which I think is ok. There does seem to be a little dip on one side of the sole right net to the blade opening. Thanks again and have a great day.