Yeah, I would recess the top, like oscar shows in his diagram, but I'd still use the mounting plate. You have significant chance for blow out screwing the screws directly into the wood so close to the edge. Just get a mounting plate and recess it a few milimeters into the top, just enough that the bolts are flush with the top of your control panel. Then, just cover it all up with laminate, or an overlay and plexi/lexan and you're golden.