now I solve 4x4 like this: yellow + white centres, ortega the corners, top and bottom edges, then turn solved face to R and L, solve DF and DB edges, then UF and UB edges using a single alg. then switch centres with commutators. sad..I just cant understand redux. so centres last i guess? but i got a 1:34 average of 5 and best of 1:15. so i guess i'm not changing..