I'm having some problems adjusting the knives on my 12" Northfield MD jointer. Unlike other jointers I've owned this jointer doesn't have any adjustment for the tables other than up or down. In other words there is no adjust that I know to make the tables coplanar. On my jointer the outfeed table is about .003" askew of the cutter head (TDC) top dead center. The Northfield knife setting gauge uses the cutter head TDC as a basis for adjustment, which if used would put the knives .003" different on one end of the outfeed table. I also have a Oneway height gauge that would use the table surface as a basis for setting the knives. Should I use the Oneway gauge or find some way to shim the cutter head so it's in line with the outfeed table?