Here is the box clamped upside-down and the step is now blended. This way I don't risk splitting the ends as the cutter exits. I did this on all four sides.
 

Now that the bottom looks good again, it's time to make the top match...again. First I centered the top on the bottom that I just machined, took some measurements, clamped it to mill and then machined each side so it was flush with the bottom again (arrows). Yeah....lots of extra time here...
 

I'm finally on the home stretch after a couple of stressful days doing re-work. Why was it stressful? Because I shouldn't have to do any re-work in the first place. Anyways, I'm putting a radius on most of the corners here and I used a 3/16 roundover bit for the top and sides. I clamped the lid to the bottom, made a cut, moved the clamp and repeated.
 

Now it's time to put a nice clear finish on the box. I'm using a product from Zar which is an oil based semi-gloss polyurethane that I've used on many projects in the past. I brush on two coats total letting them dry at least two hours between each coat. I did all of the surfaces except the top-side of the top (lid) and the bottom-side of the bottom in one shot. I'll show you why next.
 

I wanted to add something extra to the lid so this is why I didn't put any clear on it yet. I'm using a stencil that my daughter Tracey sent me for Audrey's project here. This all came about when Tracey sent me two stencils each for Audrey's project but I only used one. So with an extra just sitting around, I thought I'd put it to good use here.