I don't need my salt to be very complex, I'd mostly like to use it to append characters to make my passwords fulfill (outdated) complexity requirements, i.e., numbers and symbols. So I have numbers and symbols selected as salt sources. But the salt doesn't necessarily actually contain a character from every salt source in every password.

Now, I'm familiar with a salt as used in storing passwords to a database, but those are implemented in the application, not as something the user sees. I'm not completely sure what the purpose of including a salt into the end user's actual password is. Because I'm not familiar with this use, I acknowledge that my use case may not match the intended case.

That being said, it would be nice if I could specify the number of characters to draw from each character source. I could set this to 1, and get one number and one symbol at the end of every password. Just a thought.