I didn't like the stock buttons I got with the kit so I made new ones. I wanted to have the original size holes they recommend but I also wanted the buttons to be the same size as A and B AND at the same level. I trimmed the button shafts down almost level with the face of the GBA. Trim the shaft length carefully so you still have room for the buttons to click. The buttons are a tight fit on the shafts and will need a small amount of filing done on the inside to fit snug.