Hi, some good advice there, thanks.
I may will look at the stackable cables - they are very Buchla after all. I'd be unwilling to take the S.B.G. out of my rack because I've found a few other uses for it too. It works greats as a distortion module, because it has a lot of gain in the return channel, and it's also a good way to route external synths into the modular world, because it takes them up to the right level. I've been using it to pipe a Boomstar 5089 and, thinking about it, I could also bring in my Prophet 6.
The black module in the middle is the OCHD, made by Instruo who took up DivKid's original concept, which is 8 triangle LFOs, running unsynced but at 'musical' speeds. You can speed the overall rate up, with the top one always being the quickest and the bottom one the slowest. It has a CV in so you can modulate the rate. It's a nice way to add some organic movement around your eurorack modules.