Nippon Sharyo Highliner EMU-highliner_wby-png

it would be possible to solve the bug that does not allow to unite two carriages to two other carriages in order to have a convoy of eight wagons, I raised the problem in the old forum but without success, I tried to change the knots on the ends of the carriages but without success , now I know that someone besides me raises the same problem in the repository, you can do something? thanks