Bottom Crank Heart Gear

Just in time for Valentine's day; this is a slight modification to the thumb driven heart gear box that eliminates the thumb gear and adds a directly driven center piece that is turned by twisting the base.

Updates
- 02/10/2015: Uploaded corrected sleeve stl file. This one is taller to reduce the gap, thanks to [cfeniak](http://www.thingiverse.com/cfeniak) for pointing this out. The original upload was a previous version and was too short for final design.
- 02/04/2017: Added all part