McCoy's alternating-surgery conjecture

Let $K$ be a knot in $S^3$. An alternating surgery on $K$ is a non-trivial Dehn surgery whose result is the double branched cover of a non-split alternating link. McCoy's alternating-surgery conjecture. If $K$ has an alternating surgery, then $K$ corresponds to the dealternation crossing in an almost alternating diagram of the unknot. This conjecture is presented as a proposal by McCoy; the source supplies no resolution evidence, so its status remains open.