Click to enlarge image.
Photo of Webmaster's model in progress.
The grill layout requires attention because the uprights were in slightly different locations than those on the model.
Use your preferred method of modification from the Trunk Vent section of the Vents Overview.
If you are creating a hollow vent you will have to drill through the section of part J34 directly below the vent.
Note: All instruction step numbers in () denote the instruction step for the rereleased Mincraft model.