the concerned train also reaches GR at 23:10.
there is a reason why SCR, when sending a proposal to CR, send a TT which gave a morning departure from HYB and evening departure from GR, exactly opposite of what was demanded.
but still, 19:00-20:00 does seem a good time.. I'm thinking of dropping a PG portal to ask for changing timing of GR ICE to late evening departure like you suggested.