Ken Toda wrote: "There is no plastic bushing but pivots bolts(posts) are rivetted. I inspected inside walls of arm, but there is no brass bushing as Mafac Dural Forged unit. I do not think Weinnman unit NEVER used plastic bushing as Mafac Racer. Rather they used for front washers.
I guess I'll have to open one up.. Meanwhile, be careful with the older Weinmanns with the pivot axles riveted to the mounting plate: I have one on which the riveted area corroded, and the plate cracked. Larry Black was able to find a replacement, but do watch those puppies...
harvey sachs
mclean va