How are they working out Paul??
So far so good. I take the point about the red plastic switch being it's weak point, so I make a point of keeping hold of it when walking to a window, I'm sure if I let it drag on the floor it would break fairly quickly.
The switch is attached by a screw so I'm going to make some enquiries as to wether it could be replaced by a metal switch, giving it a bit more strength.