The S0105 features a differential feed dial. This controls two sets of "teeth" under the needle.
You must thread the "Loopers" (the metal arms inside) before the needles. If you do it out of order, the threads will tangle and snap immediately. S0105 3gp
Recommend the for your specific project. SINGER OVERLOCKER S0105 - MHC World The S0105 features a differential feed dial
The four dials on the front are your story's "balancing act." Standard setting: Start with all dials at 4 . S0105 3gp