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The idea is simplicity itself - a 3 tonne vice from B&Q for 35.00 GBP and 3 bolts held in place by a bit of wood (polystyrene was not strong enough).
When the rail bar is placed in the vice and the vice is closed the middle bolt insists that the rail bar is bent in between the two outer bolts.
Sharp angles only avoided by care on the part of the operator - a 10 degree margin makes quite a difference.
A handle extension to the vice makes over bending easy but makes the right amount of bend take a lot less effort.
The clever bit was making it so that it slides along the rails so that the vice does not have to be picked up after each nip.
As in the larger units the trick is small and often for the bends and the result is not bad,
slightly over bent in a number of paces but just turn it around and it straightens rail.
This makes track much easier to lay.
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