In my continuing quest to conquer thread tension on my Gammill Charm aka Tasha, I stopped by Cut Up and Quilt to chat with Jade. They have two Gammill Statlers and Jade is their expert. Her observations/recommendations:
First, don’t thread your machine as instructed in the manual. Below are adjustments I made to my Charm based on her recommendations and how she threads the two Statlers.
Pretension knob: thread clockwise around the pretension knob. Note there is NO twisting of the thread as it comes back through the eyelet.