"See, that's what I thought." He replied, tracing a line between two others, "But if those two pairs connect, it means these two don't." He shook his head, brow furrowing, "Honestly I just need to sort out what it was they were trying to do, because that's the only way I'll be able to replicate or reverse it."

He stopped then, brow furrowing more deeply, "No, wait, hang on a tick. These two connect outer circle to inner circle, and working anti-clockwise as you should but I was translating clockwise, the next pair is matched inner circle to outer circle." He rotated the sheet he'd sketched the thing on, fingers tracing from one to the next, "They were trying to just... stitch the two together. Except, at the end, here, it should be outer to inner again but they're swapped."