Customizable Heart shaped box

[Edit reworked for adjustable base and lid thickness. Feels better with more weight.]

This box modified from Kit Wallace's github.

• https://github.com/KitWallace/openscad
• http://www.thingiverse.com/kitwallace

Added:

• Dimensions
• Option to show Cross section to see fit.
• Overlaps calculated for F6 stl creation