So honestly, I can't find any adjustable thrust arms that aren't prohibitively expensive.  
I came across these bushing kits.
https://www.pelicanparts.com/More_Info/PELTETABKA01.htm?pn=PEL-TE-TABKA01
  They say "adjustable", it seems that it really has only two "settings". Am i seeing that right?
Has anyone used these?  How much am I going to get out of it?  
Or does anyone know of a thrust arm that's in a reasonable price range?  
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