ignore eagle scratch files
lots of board cleanup:

removed thermals on high currenta ares

HEAPS of trace simplification

shrink 3v3 plane, use space for other signals

bulk up many polygons, use ranks to prevent shorts

separate analog ground, connect thermistors to AVCC/AGND

make trace angles 45 degrees

broken polygons connected

heaps of other fixes

changes to schematic:

thermistors connected to AGND/AVCC
vias tented
give main IC value of LPC1769 to ease BOM generation
switch 78L12Z for 78L12F surface mount package. also route remaining ratsnest wires- all were traces contacting pad, just not connected to center of pad
USB-B connector, solder jumper for 5v/3v3 UART power (NOT signals, they're always 3v3)
switch USB CONNECT transistor for a FET, move UART voltage selector next to UART header
5v trace was grazing one of the uart pins
Added polarity mark for TC4427 manually
Moved C34 to allow heatsink to reach all four drivers from side
Fixed I2C Header Spacing
General Silkscreen Cleanup
Added thermal relief to large caps
Removed Mosfet Driver Power SMD Jack
Removed second ground connection from IC11 (to improve MOSFET_DRIVE trace current handling)
Added BOM
Fixed MOSFET labels on schematic to match BOM
Changed 78L05 from to-92 to sot-89 in bom, updated USB connector in BOM
Changed Heated Bed connectors
Cloned 4driver board to 5driver in preparation for future work. No changes to board yet