Originally Posted by
SteveH
The 46x1 needles have a full groove on both sides. (Two thread double chainstitch) I can't imagine that would work very well with a normal lockstitch machine
Why not though? The groove's just there to make space for the thread, what would it do to the stitch physics if there was just empty air there? Not much. A little less resistance on the fabric on that side is all...