Ebay bargain
I tracked down my problems with spongy brakes to a piston sticking in its seal. No amount of cleaning seemed to help, and I eventually spotted a very thin, very deep score down the side of the piston. I've got no idea how I didn't notice it before, but there you go.
So....£20 for new piston from Wemoto? Sod that, eBay time...
I got a pair of calipers for £20.79 delivered. Bargain. Except they were a complete mess. Came off a bike with 7k miles on it apparently, but coated in caked on brake fluid and brake dust and looked corroded to sin, which is why they were so cheap. No problem, I thought - a day spent cleaning them up and they'd be fine.
Wrong.
It took less than 2 hours, as all the crap fell away. Underneath were gorgeous, clean calipers - no seized pins, seals are fantastic, all the pistons were corrosion free. So £20 and 2 hours got me a pair of these:
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