FMOS: The fiber multiple-object spectrograph IV: Current status of OHS-based spectrograph by Iwamuro, F, Maihara, T, Ohta, K, Eto, S, Sakai, M, Akiyama, M, Kimura, M, Tamura, N, Noumaru, J, Karoji, H, Dolton, G, Lewis, I, Tosh, I, Murray, G, Dipper, N, Robertoson, D, Gillingham, P, Smedley, S, Smith, G, Frost, G