Hoping this is the right thread to post this; if there is a more appropriate place for it - please redirect me there.
I looked into buying the Weber cutting board accessory when I bought the end shelf for my new EX4. Reading reviews and looking at the price of the board suggested I might see what I could do on my own. I had some spare oak and a bit of teak so I glued that up with the idea of slicing to length/width, then plane to thickness so it would fit the brackets on the shelf. Once I got there (thickness) it occurred to me that those edge glued boards would never last long so I laminated a piece of plywood to add strength. Sanded things down, liberally coated the underside with spar polyurethane and the top working surface with butcher block oil. Time will tell if it stands the test of time and weather. I'm now noodling an idea about some sort of shelf that could be 'tethered' between the 4 legs in a non-permanent way and provide a place to store all the gadgets I am rapidly accumulating (eg. I just bought a GrillGrate).
Cheers