(R U R' U') x3 or M' U M U' (repeat as needed). Step 2: First Layer Corners Insert the corners just like a 3x3 using the Sexy Move : Algorithm: R U R' U' Step 3: Second Layer (The Equator)
The "edge" pieces on the equator are actually rectangular, while the corner pieces look like edges. fisher cube algorithms pdf
On a 3x3, centers have one color. On a Fisher Cube, the side centers have two colors, meaning their orientation matters . (R U R' U') x3 or M' U M U' (repeat as needed)