A bit late but on Saturday (25/5/2013) stabled at Epping wereThe Hitachi sets you mentioned aren't correct.278M-1919T-277M - 300M-2007T-299M288M-1979T-287M - 276M-1910T-275M285M-1977T-286M - 274M-1909T-273M
In March, four Hitachis were rearranged as follows
288M-1979T-287M-293M-1987T-294M
279M-1922T-280M-276M-1910T-275M
278M-1919T-277M-286M-1977T-285M
273M-1909T-274M-300M-2007T-299M.
On another note, I saw 288M-1979T-287M-293M-1987T-294M at Ringwood running a Belgrave service on Friday at 605pm.