You can 'shoot' to UBR by just doing U' actually. And after youve finished centers, undo the U'. Just remember to account for parity before/after doing this. Also note that UFL 'becomes' UFR after this.
You can 'shoot' to UBR by just doing U' actually. And after youve finished centers, undo the U'. Just remember to account for parity before/after doing this. Also note that UFL 'becomes' UFR after this.