cvs2svn conversion - can later updates be done?

I am working on converting eight CVS repositories to Subversion.
The CVS repositories are managed by CVS(nt) on Windows Server 2016,
migrated there 2 months ago from a Windows Server 2003.

The new version control server is also running VisualSVN with
Subversion 1.9.7.

To do the conversion I am using cvs2svn version 2.5.0 on an Ubuntu
16.04.3 LTS Server. Python on the Ubuntu machine is the 2.7.12
version.

Prior to conversion I have committed all of the uncommitted changes I
have done myself and I have requested the developers to also commit
all of their changes.

The procedure I used to convert each repository is this:
- Copy the repository files to a migration folder
- Remove projects not needed in the conversion
- Remove all CVS subdirectories in the repository (otherwise errors)
- Remove all top level files so only subdirectories remain
- Create a zipfile for the repository folder using 7zip
- Copy the repository zipfiile to the Ubuntu 16 server
- Expand the zip on Ubuntu into a migration folder
- Run cvs2svn using an options file to create all projects as
subrepositories in the main target repository
- gzip the resulting dump file
- Copy the dump file back to the Windows 2016 server
- Use the VisualSVN management console to import the dump file to a
new repository

All of this worked without any visible problems. But it took quite
some time to do...

Now I wonder what will happen if some developer commits changes to the
old CVS server....
Is it possible to update a Subversion repository with the new data
somehow? (Except by manually copying the files to a svn working copy
and committing from that). I would like to do this server side.

I could use robocopy on the CVS repository to extract files that have
changed after I made the migration into a folder structure that
exactly mirrors the repo structure.
If I use cvs2svn on these changed files (probably a small number of
files) can then the resulting dump file be used to "mirror" the new
commits in CVS to the Subversion version?

Or is there some other way?

-- 
Bo Berglund
Developer in Sweden