Hey Eric, Some times it seems like I do! I have quite a collection and continue to work with various OAR configurations. I think the shackle would tend the biner well SRT with the HH and be strong enough for DRT also.
Levi, sadly I do not have access to a Hitchhiker to experiment with or post a picture with the above shackle. The spacing is right I believe, based on the dimensions of the HH, as the shackle is 1-1/8" wide between the eyes.
If anyone has a used HH system they would be willing to let me experiment with, I would send it back with the above tending attach point shackle as a way of thanks.
Gordon