I'm doing some research to help someone working on an auto upholstery. They are working on a Pfaff 145 which uses the 190 series needles. Sewing leather is not a problem but the vinyl does present some issues, particularly the holes created by the needle being too large.
She switched from the 24 thickness to a 21 but still has the issue with the holes being too large. Of course, we're going to go with a thinner needle but am looking for needle size recommendations for automotive interior vinyl as well as needle manufacturer. Orange, Organ, Schmetz, Grosspeck(sp) etc.
Any advice is greatly appreciated. Thank you!