2-7 relay K4 Big cubes 10:

Big cubes solved with K4: UWR for K4 relay? 10: 7x7 - 4:07 6x6 - 3:16 (bad k4 ELL) 5x5 - 1:34 4x4 - 1:10 (bad k4 ELL) 3x3 - 18 (no inspection at all) 2x2 - 5 sec