From their page here:
Complete Assembled Flex3Drive to chosen filament diameter
Quality Printed parts in Black ABS as standard – other colours available upon request (specify with order)
Hotend Clamp for selected hotend version
Includes two bar rigid link tensioner mechanism with quick release lever
Additional screw based filament Tension Arm
Motor Mount Assembly
Flexible Driveshaft with printed coupler and PTFE tube
PTFE Filament Guide Tube
PTFE Tube Clips
Hotend Cooling Shroud
(Note: Hotend not included)
Looks like the motor mount assembly mounts to a standard nema 17. The motor - driveshaft coupler is printed. I would have prefered a metal coupler. From what I can discern, you have to figure out how to mount the motor to the printer and mount the extruder to the carriage yourself since they do not offer a Lulzbot specific version. With the weight savings, the dual extruder looks interesting too.
I’ll be sure to do a thread if I get one.