Printer bed upgrade and serial number question

Hi all Im looking to upgrade the bed so naturally i was looking at the modular bed system and i saw the warning that it didnt work with earlier models. My serial number doesnt seem to match the convention.
my serial number is KT-PR0045NA-11114
All of the serial numbers seem to be PR0035 not 45 and they all have four numbers at the end not five. has anyone seen this before? I want to go to a flexible build plate, i find with PLA i actually get too much adhesion on the bed and it makes the prints very hard to remove. Anyone use the octograb yet?