I was using my 22-540 to plane some 3' lengths of curly maple to 3/4 and I noticed that I was getting some pitting in areas. What would cause this? I know that the machine is noted for sniping, but I have never experienced that or pitting like this when planing in the past. Also, it has fresh knives on it 30lnft< and has alway provided me with great service. Is this just the beast of working with firgured wood and do I need to tell my fiance that I need to buy a drum sander?