I made two changes to mine. I lined the "V" cut with split reenforced rubber steam hose and attached it with sheet roofing screws. The hex-heads stick out and grip the bark. And, instead of the banjo shaped hole I drilled three 1-/2 holes in a row. I thread the rope (from the outside edge) down through #1, up through #2 and down again in #3. Then I tuck the loose end under the loop formed by #1 and #3. Infinate adjustability for tree diameter.