Here is a video link to your build. Do you think the 195 rpm is going to be about right? Were you able to measure the speed of the belt or just a guess? I ordered several motors last night in that range from a bit slower to faster. Thanks for the video!
For tracking i crown the rollers a bit, it doesn't take much, but with the center spline and original rollers you may not need to deal with it.
https://youtu.be/8DsMjBCIgkw
Jim