This is a mounting adapter block for the Flexion Extruder to the Solidoodle 2 (Pro) 3D Printer.
I have split the Part into 3 seperate chunks in order for it to be printable without support structures.
As I am using the E3D v6 Hotend, this is specifically designed to work with the E3D Hotend, the Flexion's own Hotend might work, however, this was not tested - mainly because you will most probably need one of the Heatbed-Mods available out there to be able to reach the Heatbed with any other Hotend.
I printed this using 100% infill in ABS, other settings may work just as well but have not been tested.
UPDATE: I have added a little extra bulge on the right hand side to avoid the sliding (X-axis) part getting stuck while homing at the limit-switch.