B
boarcity
you cant buy the channel. the good thing is the wagtail channel is made of a soft alloy and easy to straighten . how i do it is leave it fitted in the handle [you dont want it kinking where the centre screw hole is] and then hold channel up to a wall , use your eyes to judge if its straight compared to the brickwork/mortar line . if bent out of true i put the channel over my knee and flex it a tad to get it straight,then compare it up to the brick again.