Here is a photo of the Plastic Scribbler Asterid with a Flexion Extruder mounted to the X-carriage. It is possible to modify the printer and print Ninjaflex on a Plastic Scribbler Asterid at full-speed. However, these instructions are incomplete. If you would like to improve these instructions, then a 50% Flexion Extruder discount is still available for the Asterid. The file for the carriage mount can be downloaded here:

Scribbler mount STL
Ninjaflex extruder mounted to Plastic Scribbler

Flexion Extruder mounted to Plastic Scribbler