'38'Cable brakes with 'Floaters'

[flathead_jr]

The 37 and 38 already have a "floating" mechanism / adjuster. What is the difference in the stock wedge, vs. what Flathead Ted provides for the 37 & 38? Has anyone ever used the 37 / 38 adjuster in the 35 / 36 brake assembly? I pulled a couple out over the weekend from some spare 37 backing plates that I have, and the cast piece that rivets to the backing plate seems to be the same up to 38. Unless the adjusters stick out to far why couldn't I just use the later parts in the earlier system?