[QUOTE=phfitz;1499202]. . . It is still best to check on the easel with a micro-sight and test negative. . . .
Yes, indeed. Since this is the ultimate test for corner to corner sharpness, it can well be the best way and certainly the cheap way to perform all alignment, too.
As JP498 noted, if the negative and easel aren't perfectly parallel, a tightly cropped negative may not precisely fit the easel. This is only critical with a negative carrier that shows the film rebate area. Otherwise, slightly looser cropping in the initial capture permits fine tuning the cropping of the print.