Pulley grub screw location

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Originally Posted by booski

And any more info on balancing with a scope?

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Something like this:
Balancing Tool
Or you could use accelerometers...

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Originally Posted by booski

I assume when turning shop bought pulleys its better to chuck up by the boss and not flanges?

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Never hold them by the flanges - they're only pressed on and not very strong. Hold the pulley by the boss and it's sensible to check with an indicator that it's on center.