Since no one was sharing the file I decided to buy it anyway and just hope the IK was decent.
But when I went to the store the model was gone.
The model that olepatrick made has been removed now because of copyright fears.
Damn it, I hope someone is still willing to share the files that managed to get a hold on it.

bump, I want to try how the IK performs before I buy it.
It's also sold on his patreon:
https://www.patreon.com/olepatrick/shop/v1-ultrakill-model-979332?source=storefront

Question about the RUNYANT Model-02. Does the name imply that there was a RUNYANT Model-01 or does Model-01 refer to CYANT Model-01?