(R' U R' U') (R D' R' D) (R' U D') (R2 U' R2) D R2
SDB
(R' U R' U') y (R' F' R2 U') (R' U R' F) R F
CubeHead, FZ
Setup D2' R' U R D' R2' U' R' U R' U R' D' R U2' R'
Case 1 of 4 in Diagonal Swap
(R' U R' U') (R D' R' D) (R' U D') (R2 U' R2) D R2
SDB
(R' U R' U') y (R' F' R2 U') (R' U R' F) R F
CubeHead, FZ
Setup D2' R' U R D' R2' U' R' U R' U R' D' R U2' R'
Case 1 of 4 in Diagonal Swap