Op,
Not certain I follow you. I have a Crespo wing, manufactured by Street Concepts
And it's attached in the same format as the oem tailgate cap with the exception of the top snap in pieces.
Per the pics attached, you can see I upgraded from the plastic inserts to screws
And developed my own brackets to avoid a 3m tape only mounting process.
By far the hardest pieces to mount were the corners which are designed to be molded into the bed side.
Say what you will but I've seen well in excess of triple digit speed since mounting and no movement.
To steal it would require access to the bed, but that is locked down with a cover and the tailgate locks, so it's going to take someone really looking to create mischief with your truck to get one off.
My thoughts