The one I am sewing on is a gear driven. The adjustments I made for free motion is I did not lower the feed dogs. It sewed better with them up, but I put the stitch length in the sweet spot just between reverse and forward. The tension is set on 4 and the foot pressure is very loose. My husband told me to go out and get a new machine, but with the way this one is sewing I couldn't find one that would last me almost 70 years. I would be lucky if a new on would last 10.
Mary