had to go back 5 pages to see what all the chat was about, while going back from page 136 to 131 I found it funny as a couple of people who posted what seemed like detailed info about the design didn't even have an rb6. no big deal just funny. So when I finally saw the pic I just thought about how nice those A.P.E. plates are....
Surely in testing someone at some point cased that spot so I would be surprised if K got the "design" wrong.
Does the chassis get treated after machining? perhaps this is simply a bad batch of chassis.