10 years coal mining, 25 years teaching, 10 years Head of Faculty, now retired...
Close enough ?
I've had their complete (unbranded) 27x1 1/4 wheels - the alloy appears to be a bit soft (i.e. easily scored) but otherwise seems ok
Servo mounting tape as used in radio control models?
My mistake - I thought you'd got close to a red heat!
If it hasn't cracked already, it should be ok - you'd see cracks starting as you beat the ends to shape, by which time it's probably too late. I was trying to add a bit more information to your idea if anyone else wants to try this - what you've done looks fine and I'm very much in favour of making things fit properly.
Re-heating at this stage will result in a 'softer' material - less likely to suffer brittle failure but more likely to distort under load. This might be a good thing (compliance / accommodation of variations in thickness / better alignment when bolted up) or not so good (elongated holes, bolts becoming loose) - very much a case of try it and see.
By heating it, you're annealing the metal - it will then work harden as you beat it to shape, and may need re-annealing part way through the process to reduce the possibility of cracks forming.
Many aluminium alloys melt before they reach red heat - old school / low tech metalworking would have you polish the surface and smear it with household (bar) soap before heating, and remove from the heat as soon as the soap turns black. Polish again before shaping - it's easier to clean if you haven't beaten burned soap into the surface...
Regarding the headset and bottom bracket - presumably you've found Sheldon's page
FWIW I've found the nylon headset bush to be adequate on a 'standard' (i.e. not upgraded) Twenty - not wonderful, but good enough if kept clean where nylon meets steel.
Sale price for 13000mAh (should be £30)
Full price for 10000mAh ?
"...I got confused with the 5p & 10p..."
That would never happen in Yorkshire :)
I think many are now copper plated steel?
Probably makes little difference to ants!
You might be surprised at how few copper coins are made from copper - try running a magnet across your loose change...
... not that ants carry magnets?
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