I recently picked up a double knot v2 and can confirm that 10" cables are plenty long. In fact, I just picked up a few 5" cables for shorter connections. It’s been a ton of fun so far. It’s still very much an interesting mystery machine, but actually somewhat intuitive. patch outs to ins, punch in some patterns and repeat. Add some FX and off you go.
edit to add - check out modularaddict.com for banana cables, if you’re in the USA. They fit the DK nicely. They are stiff though, so they stand straight up. That could be a pro or a con, depending on your preference. So far, I have no complaints.
Side note: naturally, I have a cocoquantus on the way to add to my little banana farm (Double Knot 2, Benjolin). I have found a lot of enjoyment in the process of twisting knobs and patching cables – something almost meditative. I know that sounds a bit fluffy, but it’s a different workflow to my usual suspects (elektron gear). Now to see if I can marry the two sides together in some way. Ok, I’m done hijacking the thread.