Fusion Series (Standard) Back Extension ili ndi mapangidwe oyenda ndi odzigudubuza kumbuyo, zomwe zimalola wochita masewera olimbitsa thupi kuti asankhe mwaufulu kayendetsedwe kake. Chiuno chotambasula chimapereka chithandizo chomasuka komanso chabwino kwambiri pamayendedwe onse. Chipangizo chonsecho chimatengeranso zabwino za Fusion Series (Standard), mfundo yosavuta ya lever, luso labwino kwambiri lamasewera.