I was thinking of this because sometimes a map might have a a 2x slider or section right after a spinner and it may not work to put a warning right between the end and the slider. Also, some cool effects could be made with being able to see an SB over a spinner. This could obviously lead to some cases where it's impossible to see the spinner though. And btw there would be a toggle on the SB items to determine if the mapper wants it over the spinner.