I'll try and put take some photos tomorrow, I would have preferred some deeper gutter like I have some bits of, but OH had the 6" so that's what I got. Planning on 18" apart, only drilling holes in the end pieces, with piece of plastic on the inside to slide up or down to allow water out or not.
Not finished yet but the idea is there. Planting some 80cm troughs as well, took lots of runners last year :-).