For the price it seems well worth a punt. Should be here by Monday.
The Pace Rocker looks too complicated for my feeble chef brain to deal with
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The problem with those is that being made of steel they can flex, which is one of the reasons people think canti brakes are bad.
Better to spend a little bit more and get something in alloy.
Send me your email address and I'll scan you something about how to set up cantilever brakes. It's not hard.