Ngenxa yamandla ayo aphezulu aphezulu, ukumelana nokugqwala, ukusika okulula nezinye izici, i-Gffr rebar isetshenziswa ikakhulukazi kwiphrojekthi ye-Subway Shield ukuze isetshenziswe ukusetshenziswa kwe-Insimbi Ejwayelekile. Muva nje, ukusetshenziswa okwengeziwe okufana nomgwaqo omkhulu, izikhungo zezindiza, ukusekelwa kwePit, amabhuloho, ubunjiniyela basogwini kanye nezinye izinkambu ziye zakhiwa.