Just got a 6x6 and 7x7. What are the rules of thumb for process of solving the centers? For the 6x6, I do the 2x2 center on a face, then the 4 2x1 blocks representing the cross of the center, and then finally the 4 corners of the center. Similarly on the 7x7 except it is 2 stages: 1x1 cross pieces next to centers, then the 4 corners of the inner most 3x3 on a face, then 3x1 blocks to get the cross of the outmost 5x5 of the center and then finally the 4 corners.
Is there a better way?
I watched the Vcube 6x6 tutorial and I didn't like the make 4 blocks of 1x4 for the centers.