4-Color Mastermorphix help

[Imperatrix]

I oriented all the center pieces yet I have parity on one of the centers. Any ideas how to flip it? o.o;

 

[anythingtwisty]

R U R' U x3

 

[Imperatrix]

Oh XDDD Fail on my end. Thanks!

 

[peterbat]

You can also use:

(R L U2 R' L' U)*2

(which fingertricks really nicely on an actual cube, if you need to rotate centers on 4x4 bld).

Thanks go to Dan Dzoan who showed me this (while I was solving the same puzzle as you) as an alternative to doing two T-perms.