Setting up a propagation bench in the GH

I have a heat mat not a large as yours 100 X 60cm. but to protect any cuttings ect. at night I cover it with heavy quality fleece, but doubt if you would need to bother with that, but I must try using the capillary matting on it as I sit a tray with the matting on the base of it, without the tray I will have more space for plants on the mat, only other thing I will do is have a bit of matting feeding from a water container (4pt. plastic milk bottle with a side cut out)