Curious what issues were found with attaching via machine screw / lock nut. That's how all of our walleye boards are setup, and they seem to work fine. I would say sometimes they trip great and other times they don't. If a fish is on, I only give it one try to trip the board. Also, just my observation the rubber on the original Sams Pro makes it easier to wrap braid line -vs- the Orange Zams Pro. I can't comment on Amish Outfitters release as we haven't used them.
I do like the double snap idea, and will need to try that on a couple.
Bob