To deal with the handle chafing the line at the thimble, I push a short cut line through the trap line (including the eye-splice tail, bend it back, and whip the line like mad. Then I put a piece of shrink wrap over it so the handle jams on the line and doesn't reach the thimble. I do like the idea of these blocks in this application because chafe at the sheave can be a real problem with the take-up tail.