Roger Mills wrote:

Can you, with help, get the rads into a position where you can hold the
bushes in a vice? If so, you've then got plenty of leverage, simply by
rotating the rad.

Sounds a bit OTT :-)

Mind you, this got me thinking. I suppose one could bolt a vise onto a
long beam, and by clamping it onto a nut form a very long adjustable
spanner. Vises are a bit big an unwieldy, so how about those clamps
where you just buy the metalwork and bolt them into your own piece of
timber? A long timber with both halves of the clamp near each other at
one end might make a good super-AJ. Not sure what you'd need it to undo
though.

Pete