One Wheel
Member
I have not heard of cage or sandwich methods, but I'll look into them. btw, I just ordered a Qiyi 5x5 so in a few days I'll find out whether M slices still work at that size or not.
5x5 M slices are clunky, but possible. Bigger they get tougher. Of course you can always stimulate M slices with R, L and x. I never bothered to learn R U Z- and H-perms, and once solved a 10x10 with I think a Z-perm.