Thanks for the reply.I use 3 sizes, 14" for upstairs....10" for downstairs but can also use the 14 on patio doors. and a 6" for narrow and small windows. I have modified the heads by using a vikan scrubber mop peeled back a layer at the back and fixed onto the channel by using pond pump black pipe with a slot cut in it lengthways to hold on the cloth firmly and then clamped with plastic clips used for holding pipe on cars, just fits and tightens the pond pipe. I use standard microfibre wagtail blue pads for the 10 and the 6 with the same clips.
If you had the choice and you could only carry on size channel for all your work, which size channel would you choose 14,10 or 6?