ordered some cool stickers wondering if anyone has any experience customizing their SP. Specifically if they know how well something sticks to the etched in FCC text on the back thats uneven with the rest of the flat surface

i'm not really sure what you are asking but you can take off the upper plate by unscrewing the 4 inbus-screws. if you flip that plate over you can cut off the excess 'sticker' from off the pads. hope that helps