Jeff,
The scrolls are smooth, the cuts reflect light and the straight lines on the cross hatching look straight. If anything, like most of us, the long straight lines are the toughest to maintain straightness and consistent width and can always use more practice. I see quite a variation in the half diamonds on the running border. It looks like one pass has fairly pointed cuts and the other direction the cuts are more rounded. Are you cutting in the same direction, say right to left, and using both the right and left edges of your engraver for the border or are you cutting the border always using the left side of the tool? I found out for myself that always using the left side of the engraver when cutting these half diamonds gave me a more consistent cut then using both edges of the engraver. It was, still is, hard for me to duplicate the same motion cutting with the engraver tipped towards me and then tipping it away from me.
David