Adding a spoiler.

Hi. I have a 2026 EB premium and would like to add a spoiler at some point. For those of you that have done this, how difficult is it to do yourself on the s650? I was watching a couple videos on it and it seems fairly easy, but I am confused on whether or not these spoilers just pop on where the original one was or does it require drilling holes? Is this something I should have a body shop do?