I'm currently creating my own component for one of my websites and I would like to replicate it across my sub sites. My understanding is that for this I need to create a plugin to define the tables and what not.

I'm capable of handling the coding myself, but is there any kind of documentation or tutorials on how to do it?

Thanks.

Create a specific plugin to declare your own specific extension is something that we do in 1 hour of billable support.
You will have to send us by email the package of your specific extension or at least during the support session describe us the MySQL table that are used by your extension.

Our billable support can be ordered at
www.jms2win.com/en/joomla-multisite?page...35&category_id=1

When the specific plugin will be created, you will be able to modify it to add new specific extension definition.