Weight: Manual doesn’t specify it either
A: They are built to work in spinning and twisting frames making use of tape belts that are stitched or joined.
A: Yes, it comes with a bobbin winder, screws, and needles, these are present in both models.
A: Yes, components of both the models are interchangeable in practice with some restrictions.
A: A hand driving attachment is designed for use in the Model 11W6, whereas a motor drive is incorporated in the Model 11W7.
A: Yes, there are options for adjustable belt guides as well as knee lifters for improved control when sewing.
A: In both machines a drop feed mechanism is used to allow smooth feeding of the fabric during sewing.