The III's are close (but not exact) copies of the later VI necks I've tried. I'm not sure how they compare to the earlier ones. When I went to upgrade the neck on my S80, my first choice was a VI neck. The current offerings from Ebay were in the $400-$600 range. I then tried the III neck as they were supposedly very similiar to a late VI neck and were only $275 out of woodwind and brasswind. The III's neck is close to that of the VI, so close in fact that I could not justify spending the extra money. Besides I like keeping a surplus of money for reeds, XLR's, tuner batteries, and all of those other things that you need at the worst times.