Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2202794.

Revised Smoothie board mount with hex holes to reduce filament needed when printed solid or with infill. I also reduced the amount of polys, looks just as good but will take a lot less time to slice. You may need some spacers on top of the board if using metal screws for the board itself, I just used nylon fixing screws.

Pictures are a smoothie 1.1 mounted on the top of my Delta, not its final position :)