No, there is quite a lot of digging. I dig a section, then do the pipework in that bit, and there is quite a lot of mucking around with levels and so on (this is surface water drainage from the sunken patio, and levels are absolutely critical). So, that's lot's of words for "I haven't finished, and will be digging tomorrow".
Hey, was it you who nipped down here and let the air out of my rear tyre whilst I was away? I left it in perfect order, 100+ psi, and came back to find it flat as a pancake. That's not fair!!