The reload time is used to prevent quick repetition of cannon fire and is intended to be used for IR battle. So that is quite different from what you are proposing.
But yes, what you request is possible. Here again however we are talking about a very unusual use-case the addition of which would be a "feature" to one user and added complication, confusion, and clutter to every other user. So it is not something I deem a good change.
This project is open-source precisely for this kind of one-off application. There is nothing stopping you from modifying the source code slightly for your own requirements. Because you would just be making the changes for yourself, you don't have to make it fancy, we don't have to make complicated interface alterations to OP Config, or update the documentation, or the website, do extensive compatibility testing, create new release files for GitHub, etc, etc, etc... Just download the source and write your own code. You could add this functionality entirely on the TCB side so you don't even have to change the OP Config software which is much more difficult.