slack between JSME-JAJ must be reduced. 1 hour speed up possible.
slack between BXR-DDU must b reduced. 17 minutes speed up possible.
slack between NHH-LKO must b reduced. 28 minutes speed up possible.
slack between JRC-JAT must b reduced. 35 minutes speed up possible.
Overall...
more... 2 hrs 20 minutes speed up with extension to SVDK Very possible .