Window sliding shoe mechanism

I had a Cascade brand double-hung, double-paned window fail. The bottom of the shoe is fairly thin and made of 10-year old low-quality plastic or vinyl. Replacement was going to be $1,100+. So I designed and printed replacement shoes (which was what failed) including the rotating lock.

In the photos, you see the original from another window in white. I printed mine in red because it's the ABS I had available and you can't see it anyway, but really printing them in white would be better.

Th