How many times has your groundman had trouble getting your lowering line back to you in the tree after lowering a branch or log from a leader a good distance from your lowering point?
My newest trick to solve this lack of efficiency and dependence on highly skilled groundmen is a modified retractable dog leash zip tied to the left side of my climbing saddle.
By also zip tying a krab to the dog leash snap, I can tie my branches and logs off as usual, but before making my finishing cuts I'll clip on the leash krab between the load line and lowering point, after the cut the leash is quickly pulled out and away by the lowering line until it reaches the lowering point, the piece is lowered as usual, but through the krab on the leash. Once the piece is untied by the groundie, i have him hold it while I reel the lowering line back to my position by hand, the leash spring automatically respools itself.
The zip ties are important as failsafes, and knowing your leash is long enough to reach your lowering lines centerpoint and then some is also critical.
It's my latest trick, and I recommend extreme caution be used trying it until you become accustomed to it.
Be careful with it guys, it is far faster and efficient once you get experienced with it a little.
Work Safe!
jomoco