Precise focusing for CCD imaging is essential. The "old" Takahashi FSQ-106N focuser is excellent and need just an attachment of the Robofocus stepper motor. While the motor can be attached using the coupling and aluminum brackets provided by Technical Innovations, I elected to manufacture my own way of attaching the motor, which would allow me to quickly attach it (for imaging) and detach (for transportation or visual use). The key is the coupling (clutch) between the motor and focuser shaft.