Portal machine got dismantled and now it has become a time machine. He took out the ulric from it and started to install it in the time machine. He has calculated the time for the first time he went into the portal. Its 17.5 days in qubetron and 378 days for this time machine construction 395.5 days. But he put another 90 days extra for the construction of the portal. So totally he has to travel back 485.5 days and he has to calculate the time of John's arrival for his mother's death. It's 5 days before his arrival back to Earth. So it's 12.5 days after his journey. It means he has to go back in time for 485.5 days and after going he has to construct the portal back in 90 days. Then it's the exact Time for the entry of the portal and exactly after 5 years(Time dilation 2.

