If you nibble the plunge line back just a bit you won't catch the outside edge of your sharpening stone on that portion, hell on a soft water stone ( look at a Karl Anderson knife).
You can really make the figure in Maple 'pop' by using two different colors of stain. High end mandolin makers will but a darker stain on first coat, let dry completely ( at least 24 hours) and come back with a lighter stain overtop the first. Use circular motions as you apply, get the stain in deep until you are satisfied that your stain has fully penetrated all of the pores and grain.
The maple to guard transition point is harder to blend to invisible with something as light colored as maple unless you have a perfect fit up. Many knives are not perfect, the maker has just learned to blend some things to 'invisible' through technique and coloration (spacers can also help blend the transition point of differing materials).
Other makers, however, have learned 'perfection' (or something that passes for perfection).
Nice job!