Alright, stop with the flame war, the link has been removed.
C830/C751B/C951 Fan's original username was C830/C751A/C751B, as
seen in this post or below:
Here I am! I am C830/C751A/C751B Fan!
This is quite obvious that C830/C751B/C951 Fan created the
unofficial 6 Car C830, since his previous username appeared in the
readme file.
Note that only developers assisting the thread starter and the
thread starter him/herself can ONLY post download links for
their add-on. (Excluding cases where someone is helping out another
user to locate the link)
In this case, only SBS7322B and Bryanwee1 can only post download
links for any C830. (Advertisements modifications should go to the
List of Downloads section and the train thread itself.) But for
this case, it's an unofficial modifcation of a C751B, so it should
not be posted in this thread, nor the C751B thread, as no
permission was given.
In any words, please do not release modified versions of add-ons
without permission of the original author.