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@Harry.Major
I have this problem too. Perfect 42mm chainline leaves the spider of my 75s about 1mm away from the chainstays. When I stand up and pedal to the max it goes scrapy scrape.
only way to avoid it is not have perfect chainline. Or, new rear wheel with Paul hub to use a 44mm chainline and then re-adjust the Phil BB for perfect chainline. yay more money to spend.