Originally Posted by
burnthesheep
I didn't believe gsa103.
gsa103 is right. Regardless of whether I put the transition between the two donor cassettes at the 17T to 19T shift or the 16T to 17T shift, when I spin the custom cassette slowly by hand under a light shining at an angle, I can see an incongruity in the reflected light at the transition. After reading his post, I now realize that the incongruous reflection I had observed was due to the angles of the surfaces on the teeth.