solve a rubik's revenge

I bought a Rubik’s Revenge yesterday, which is essentially a 4×4x4 version of the original Rubik’s Cube.

I’m having a lot of fun with it, and I can solve it now, by converting it into a 3×3x3 and then solving normally.

However I’m stuck with the annoying parity errors which arise from extending cubes. I’m planning to figure it out and improve as time passes.

I feel so happy. I’m getting a Pocket Cube (2×2x2) next.