Most of the work was not done over two days, it says they did a bunch of prep work before the two days to minimize the downtime, and besides being done within two years they didn't specify how long the prep work.
As the Finns will presumably not permit Russia to do prep work on the rails in advance of their invasion, they'll have to do all that prep work after the invasion. The article doesn't say how long that two years of prep would actually take if needed ASAP, but if it would take a month then the Finns would have a huge boon.
As the Finns will presumably not permit Russia to do prep work on the rails in advance of their invasion, they'll have to do all that prep work after the invasion. The article doesn't say how long that two years of prep would actually take if needed ASAP, but if it would take a month then the Finns would have a huge boon.