Wow, how neat to have your mom's machine. I'd love to have my mom's 15-91. That's the machine I learned to sew on. Her husband still has it, but he's not too fond of me. It's unlikely he's let me buy, beg, borrow or steal it.
I was really disappointed in the 528. The removable part of the bed was missing. I was so disappointed, I left it in the van. I'll get it out tomorrow. I'm lucky, though, it's the first time I've been disappointed in a purchase.
bkay