Tim... I have limited experience... ... with the later models but I did work on a set on Enzomac's Bertone. He had the same kinda dimpled "locking block"... as NOT shown in the following drawing (#8)... and only one Lining Retainer Spring - late type (#5) on each pad. See page 33-13/14 here... http://www.midwesternmedicalmachine.com/~damonfg/X_FSM/PDF_Files/X1-9_331-XX_33-5.pdf On my '79... I believe there is ONE Liner Retainer Spring - early type (#1) and TWO #5 late-types on each pad! I may be wrong about the TWO #5s, its been so long... But my point is... I have NO chatter or noise coming from any of my brakes. I do know that some of these get caught and thrown off or worn down when pads are allowed to wear down too far... or lost or otherwise missing after a rebuild. I believe there are fresh sets from our normal suppliers and ya might wanna call one to see what you SHOULD have... if yur still having a problem.