A 15 x 1 needle is used in sizes 9, 11, 14,16, and 18.
The needle clamp accepts two needles of the same or differing size and yes, they can be used.
The large chart for threading which is built in the machine is the answer to how it goes through.
According to my experience, Fashion Discs allow for stitch control patterns and designs which incorporate decorative stitching.
You are sure to find their super fine control for stitch length useful as it enables tailoring of the sewing as desired.
As I observed, Regular cleaning and oiling are advised, which is made easier by the hinged faceplate which allows easy access.
Yes, as I learned, the machine accommodates all fabric weights, varying from light to heavy including low texture levels.