Nope - Just that I have never used "hand scroll" so not entirely sure what you mean by this.
FWIW I just grab the handle in the editor & scroll with that. Using that method, no issues other than those I would expect, largely rfom my shaky old arthritic hands!
EDIT: OK just figured out what you are doing & replicated. Smooth as a mink lined codpiece on my machine.
But I am still left wondering why you are going to the trouble of setting this up. Using the plain vanilla factory settings, scrolling works exactly the same as far as I can see and is still dead smooth.
Bit of a head-scratcher...