OK, getting somewhere now...
Added in the locking jack sockets. On top is the 5m roll of 50mm self-adhesive Velcro tape I bought from RS components (
stock # 4239533, R371.60 - if anyone's interested):
Velcro stuck to the top:
Wired in the cables for in and outputs. I've started buying the Neutriks again. Yes, they are a little bulkier, yes, they are expensive, but damn, they are confidence-inspiringly solid. The Amphenol feel and look like lightweights against them:

Also notice I've removed the fixing bracket from the PSU and Velcroed it down so it does not interfere with the gap - that was turning out to be a problem with so many cables going through on that side of the board.
Starting to populate the board and lay in the patch cables:
Tomorrow I'll wire in the power and do some cable tidying. I'll also pick up my compressor from the P.O. (T-Rex Comp-Nova - I picked one up at a great price thanks to a headsup from Mr. T). I'll take some daylight pics too (maybe even dusting it before taking them ?).
Over the next month or two I'll get a Strymon Lex and Bluesky. And then I'm done...
...but will still have space for one more pedal, and "who knows what happens next?")!