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Okay, here's a puzzler for all you MG experts out there:
When I rebuilt my B, I removed two very thin shims from underneath the 
rocker assembly -- the two middle cylinders.  I did notice these shims 
listed as parts in the catalogues, but in the rebuild book I have, it 
makes no mention of them.  When I called the local shop, they said they 
have no idea, and they usually just <gasp!> leave them out.  The 
question: what earthly purpose can these wafer-thin and obviously 
ancillary shims have been meant to serve?
-- Marc
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