I do patchwork on my 15-91. I have a newer brother and 4 vintage singers but the 15-91 does the best patchwork.
I take it and the cabinet to retreats. I recently bought a 2nd one to leave at a friends house because I sew there often.
I do have the foot pedals replaced with newer ones because I don't like those old post ones. I think the 15-91 is the
best of the singers.