Floating social sharing and under the post possible?

You might consider using the standard settings for the “after the content” buttons, and then outputting your own buttons for the “floating” option by modifying the location filter for the before location (I would maybe select a hook, and set filter to false…it doesn’t actually have to be “before” the content if you are going to float it with CSS anyway).

You could also add your own code to output the “floating” buttons, something like this:

add_action( 'genesis_entry_content', 'scriptlesssocialsharing_buttons_entry_content', 5 );
function scriptlesssocialsharing_buttons_entry_content() {
	echo wp_kses_post( scriptlesssocialsharing_do_buttons() );
}

That uses a Genesis Framework hook, but you could use any hook you like, and also add a container div around the buttons to allow you to target the styling more specifically. Hope that helps you get started!