ClimbMIT
TreeHouser
I am really liking the looks of this. I have been trying to come with a design like this for the past several years. This tool will save time if you use an adjustable friction saver, conserve energy with the option to sit back, save you from taking a ride on a gaff out, and be able to get down immediately for lunch! IMO
https://youtu.be/voqWoVKtiNc
https://youtu.be/voqWoVKtiNc