i have had the porter cable 12/1/2 inch planer for a few years now and it really does do a good job,,i dont think they make them anymore but i was thinking about upgrading to a 15 inch with helical head cutters,,,,the one thing i do like about the porter cable is the blades are double edged and its no problem to change them....,,and i know it might sound kinda stupid to want the 15 but i was also wanting the helical head,,i was told you could change them over but since porter cable dont make the planer anymore im sure the parts would be a hit and miss thing,,,i like grizzly but i dont know much about them plus the warranty isnt but 1 year,,can anyone point me in the right direction