No, you answered him right, but he is over-thinking it on the bold part I fixed. He doesnt have to worry about that as long as he uses the cut sheets as I already put that into the dimensions. 15.75", then the second is 8.75". If they are put together like an 'L', then the space is already fixed. The second piece (8.75") should be on the inside face of the first port piece. (15.75") (this is probably just going to confuse him more...) LOL