This is what I've been using for a year , eye sling with a hitch cord dmm ring on it , and the DMM hub to create friction with 2 carabiners. 300' of rope to lower the climber if anything happen. easy to set up and use by the groundman.
Oh shit a lot of rap knowledge in this thread...can't beat DJ premier Beat , I'm pretty much climbing with is beat in my head everyday. but it dont seem really polupar in tree climbing video.
I have enjoy your video , nice tree to work , I have to admit I'm really happy to see a good climber using DDRT , has I feel that every one else are working on srt devices....the spacer on your knot seem a good idea to. Thanks for posting