[CAUT] bridge-pin experiment

[Ron Nossaman]

> Could it be that the CA, in addition to curing the looseness of the pin
> problem, also eases the transfer of vibrations across the bridge to the back
> segments, as well as cleanes up the notching?
> 
> Joe Goss RPT

It's the springing of the pin that's loose at the top and 
supported further down that makes the false beat, not the 
notch, and vibrations don't transfer across the bridge - the 
whole bridge moves.
Ron N