This is a combination of all the work done by LeadingLights, Moriquendi ,DjDemonD and Huntley and uses the Nimble to make the whole unit direct drive.
The system is designed to hold a peizoelectric sensor squeezed between the hot end top and the Mount base. You will need some piezo transducers: Murata 7BB-27-4 As 27mm such as
Please read the description on DjDemonD's page for mounting instructions and how to prep the sensor. http://www.thingiverse.com/thing:2034152
Also, check out Huntley's page as it describes the effector in a lot more detail.
This design is designed for the E3D V6 hot end. The J-Head will probably fit, but is not tested. Overall, the design is checked and the stl files are error free. But it is work in progress.
For those who cannot wait for the Nimble to test this out, use the other mount base.
The Nimble Extruder
With an installed weight of less than 27 grams on your carriage/effector the Zesty Nimble is smallest and lighest extruder you can buy, it has ample torque and is installable in multiple orientations.
The Nimble is available at: https://zesty.tech