Hopefully, parts of my experience will help. I have a 30" KA KEW105 WD under my ovens. My cabs are framed, though.

My custom drawer front measures just less than 11.5" tall. I think the specs asked for something slightly larger. Since my decision to swap a regular drawer for a WD came after the whole oven cab had been built, I think (but dont quote me as my memory about this is fuzzy) my cab maker modified it slightly shorter so he could use the drawer opening I already had there without charging me to modify the cab.

Here's a pic. We have since replaced the panel seen here and installed a shaker drawer front that matches the rest of the kitchen.

That does help, thank you! What is the round cut-out for?

My cab maker hadn't ever paneled a WD before. He figured that I would want to work the control dial and see the light indicator from the outside with the drawer closed, but his tools wouldn't allow him to drill the larger control dial hole through the stile and panel as it was too thick. We thought it looked funny so we replaced it with a regular Shaker drawer front like the rest of the kitchen. Plus, I couldn't see the numbers on the dial with the drawer closed anyway so being able to turn the dial need was pointless. Now, we just open the drawer to use the dial. Because the indicator light is now covered, we have to be a bit careful to make sure we turn the drawer off when we're done. If its left on, we can't tell with the drawer closed. Hope that makes sense!

Breezy, how do you like the WD at that height?