Vergo

Get the book “On the Line” by Andy Kirkpatrick. Every device has upsides, drawbacks, and failure mechanisms and that book is as close as there is to a comprehensive guide to TRS. That book unpacks all of those and also describes how to pair them in the way that makes them least likely to interact wi

The device you need for the ability to rappel is called a trango vergo, Madrock (hard to find), or a petzl gri gri +. Make sure you get large enough rope (9mm or bigger usually) to fit the specs. I run a trango vergo on a small bridge, then a longer bridge to a longhorn agile knot. Basically running