I am planning on upgrading my Northwoods 20" planer to a Shelix spiral cutter head. To do this I need to find the model number for this particular machine. The serial number is posted on the side, but I can't find the model number anywhere. Maybe it's stamped on the inside somewhere? The model number of the planer that the cutter head is supposed to fit is CKM-P20. I would hate to spend all that cash, wait three to four months for delivery and then find that it wont fit... I do have a PDF diagram for Shelix showing the dimensions of the new cutter head and I may have to take the planer apart to check dimensions on the old cutter head, but that will be a last resort. Any suggestions?

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