Maybe I'm not the first to realize this, but had an epiphany last week about a kludge-clamp of last resort:
https://www.amazon.com/etc
Work great for uneven, unusual, oddly shapped surfaces. And...
Coban is great for use as a temporary adhesive -- It only sticks to itself. However, it's designed to be not very strong (otherwise its would a bitch to unwrap wounds) but will keep cables together and also keep them from wandering away from a mic stand. I used to use it almost everyday at work and I'm not sure I would trust it for anything heavy.
