the rng cycles way different on PC yeah, PS2 to PS4 had different values but the same method of cure manipulation
if you're gonna hook into the game with external programs might as well just use that mod that forces chests to spawn. then you have a whopping one percent chance for that chest to be a seitengrat!
https://imgur.com/LabbRyN
raytan
and Kana are on opposite ends of the Awesome Spectrum.