Have you seen the posts I'm referring to? They're all over prosoundweb and other places. I mean, the spiral fold is fine and I like it. It lends itself well to long path length for a box 'cause you're going around four+ sides instead of back and forth three lengths. The curves have smaller angles. But I don't see any reason why people might consider a "W" fold old fashioned and think of a spiral as somehow cutting edge. Seems more like pulley verses gear than pushrod verses OHV.

Wayne