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• #2
Get your hands on a big ass adjustable spanner from Amazon / a tool shop.
I've got this one:
Rolson Tools 19019 300mm Adjustable Wrench Rubber Grip: Amazon.co.uk: DIY & Tools
which opens to 40mm max so you would need a bigger one. -
• #3
... And hence the problem.
Bit of a long shot but does anyone have a 1 5/8" (41.4 mm) spanner? Needed for tightening an old Raleigh headset that is currently being tightened by hand as no one seems to have a spanner of this size.