Combines 1020 sickle adjustment

One question tightwad, did you change knife heads on the sickle, the 1.5in head will not work with the 3in sickle, your register will be off.

Yes, I put the new knife head on that came with the SCH sickle. Everything went together fine and turns over decent with out a bind any where during a full stroke. In the SCH instructions it mentioned something about when ran by the machine the stroke would be exaggerated a little more than by hand. Could this be IJ If so , would this "exaggeration" get me to TRUE guard centerIJIJIJ