The "Back Angle"

How to achieve this subtle "back angle" into your Cigar Box Guitar builds. A few things to note:
1. There is roughly 1/4 inch 'fall' cut into the heal portion. The neck portion under the cigar box top is thicker at the fretboard.... thinner at the saddle. 2. the corresponding shims (or blocks) under the fretboard will need to be thicker toward the end of the heal to make up for the thinner heal (and thinner towards the fretboard because the heal is thicker at the fretboard...) the reason is because you want the underside of the cigar box to maintain contact with the bridge section of the neck as well as the "shelf" near the fretboard. I hope this all makes sense...???