Good afternoon; A) In most cases a short starter is not needed. B) Grit paper held in place with Duro"All purpose Spray Adhesive". Fast dry easy to remove. C) The depth 1 to 1 1/2 , depth of tooling is up to you, remove the corners of rifling or leave some edges. Check ball desired with large patch material and ball used to fit and remove handful of patch material with ball so it will be easy to hold on too.
D) continue to use loading block if so desired. I just spit the patch push the ball in and cut the patch.
Hope this will help you flehto, best I can do. Thanks, AJ. PS. Accuracy has been a non -issue for me, nothing has changed.