Originally Posted by
wolfzx1
So really, your not looking for your current exp, your looking for the total, so you want to start with unknown initial value if you have any exp beyond level one with the perk, and then find the total amount you have by killing a single zed, pausing, going into CE and adding value 8 (8 exp per kill on normal) and do this till you narrow down 3 figures.
One of them will be larger then the others, then just modify that, as modifying the other two is un-needed to level up.