I'm a little shocked to say this, but I've had some one-on-one time with the 15-91 and I really am beginning to like it. The side mounted bobbin is GREAT. I can't believe how different embroidery is on this machine, the 201 has too much wobble to make lasting runs. I don't know if that properly describes the difference, I'm sure some of you know what I mean.
Anyway. The 201 is in storage and 15-91 is in a great portable case. Also, I've been learning how to top stich using the SINGER zigzagger. That's been challengingly fun as well. On the whole, in the last 4 days my sewing has improved about 400%. I can more or less reason out bobbin and top thread tension, adjust to zig zaggin, rewired the SINGER lite etc., it's been fun. Working on a pillow as a birthday gift.
I think I've over greased the handwheel. The motor is not running as fast.+
When I found her, for $30, she was locked up tighter than a drum.