I ordered 3 different unit soles from Cobbler Supplies because I wanted to see what they were like. I ordered Vibram Sierra soles, which are hard-core hiking boot soles like military boots, Vibram #127 Athletic soles and Vibram Newporter soles.
I resoled my homemade hiking moccasins with the Sierra soles.
These soles are really heavy and the lugs are really deep. I don't think they would work very well for a pair of huaraches, but you might be able to make it work if you used the heavy-duty Luna Leadville laces, but they would be heavy. They make the shoes feel heavy but I think I could get used to it in a few minutes and then I would never slip on any of the ball-bearing trails I hike on ever again!
I decided to make a pair of huaraches out of the Newporters. I find my Invisible shoes great for running in town, and thicker huaraches are great for running on trails and rocky stuff, but sometimes when I'm hiking, that Newflex just doesn't have enough traction. I was curious if the Newporter soles would be better than Newflex. It's heavy and fairly thick. No ground feel. But it's very flexible. Maybe not so good for running but for hiking, possibly ideal. I haven't tested them yet though.
When I was shopping at Tandy I found this leather spacer stuff that has holes already punched in it. I thought maybe I could make sandals from it. Tandy also sold buckles the same size. I threaded the lacing similar to Chacos. I wore these all day today. They feel great. I used the Vibram #127 sole on these.
I think if I was going to make a pair of huaraches for regular running, these Vibram #127 soles would work great. They are thin, flexible, the rubber feels durable and it has a non-aggressive sole pattern, it's not super heavy like the other two. If you were ever thinking of just ordering a unit sole to make one pair of huaraches rather than a whole huge sheet, these would work great.
(I think the 127 soling itself is about 4mm thick. I've added 1/4" of foam to these sandals in the middle, so that's why it looks pretty thick. If you aren't going to have a toe hole, your sandal can't be too floppy.)
Sorry I just have links to pictures instead of pictures. I was too lazy to upload 5 images.