I appreciate the links barehand!
I am still in search of this 4" seamless roller buckle. I have called numerous companies, and no one seems to carry them. They either have a seamed roller, or will do a custom one with minimums of 1000-2000. I am looking for around 50-100 initially.
Anyone have any other ideas? Or know off hand what the benefit, if any, is with going with a seamless roller on a buckle?