There was a recent eye-opening thread about some handy and cheap as chips low profile magnets for cranks, which I'm now in need of.
Would appreciate links as I can't find the original thread.
Yeah, that was the original, but I think there were some different eBay suggestions...
I've got some spare ones here you can have next time I see you.
For anyone else looking, you want 12mm x 3mm Neodymium magnets.
These are the ones I bought http://www.ebay.co.uk/itm/Neodymium-Disc-Magnets-12mm-dia-x-3mm-thick-Pk-10-/221239484935?pt=LH_DefaultDomain_3&hash=item3382e6a207
They work perfectly.