Best way to cut a channel in a wall?

[Rob Morley]

So much for my quaint theory then :-)

[Doctor Drivel]

The man in B&Q said a circular type of saw - he thought. But defo coming out as they were told of Xmas leaders etc.

[SiGreen10]

watch out for breathing through a long tube, if its too long so that exhailed air is not cleared all you end up doing is breathing back air you have exhaled, with disastorous consequences once all the oxygen is used up !!