Thanks, Tom. What I thought was: have the options in there, the user sets them and when happy with the result, goes to the frontend, select the internal css in the source code, glues it at the end of the style sheet, then, there would be a checkbox in the options to disable internal styling.
In the funvctions.php, you check for the variable of that checkbox and enable or disable wp_add_inline_style( ‘generate-style’, … ); accordingly.
Cheers!