As I understamd it-if memory serves-the changes were the flats only at the chamfers, a different sticker and a change in the Axiom "a". I didn't recall a change to the angle, however. Since then there have been a number of equally minor changes; more new stickers, new flats on the nuts instead of knurling, a bolt for mounting on the back, etc.
That's part of the reason I was wondering if they had made any changes to x-overs and such, is that they had made a model number change for something minor but didn't follow thru with subsequant changes to the model number when additinal changes were made. Although it't true that none of the changes I'm aware of has any bearing on sonic output.
