I have been braiding mostly in paracord for years. My main focus was whips and quirts. Recently I have been making a lot of horse items involving a lot of 4 plait loop into an 8 plait round braid...and those are not almost seamless for me. I have used flat braids for pretty much wrist loops on whips. I can sort of see what David is driving at....but I was not using the amount of strands he was and trying to do it with half as many in paracord.
I wanted to make a new binocular strap for an archery tournament coming up and wanted to go with a flat braid. Easy enough to start off of a ring and go...its just finishing it to another that has me stumped. I can do it...it just doesn't look right....its to obvious.