Some Dummy questions: Why does the jack soldering pin holes have 8 holes instead of the usual 6? Is it a special type of jack? Also, does anyone have a drill template for it by any chance?
I can't find them at a glance it's the serated washer with 2 pins looking thing. Probably since the buffer is only mounted via the jacks... Gives it a little more security and rigidity so not all the flex is on the jack solder pads.