I have played professionally for 30 years and had never heard about “after-weight”. I’ll have to research that. I’m glad you found a tailpiece that will work for you. I’m sure you know about using graphite (pencil lead) to get those pegs not to be sticky. You can buy a special bottle made for sticky pegs, but if you want to take the time to loosen each peg one at a time and draw with pencil lead all around the part of the peg that inserts into the fitted hole, you’ll find it helps the pegs not be so sticky. Works like a charm. Alternatively, chalk will help in getting a slipping peg to stick better.