I think the most important job of a hitch is to grab - every time.
Self tending is a bonus, but I need a lot of rope straight below me for this to happen. My groundie tends on a long ascent if required.
Let us know how you get on with it mate. If you can have a play with it when you have some time on your hands it's better than hoping it all works ok when money is at stake and the chipper is running....