Good luck taming the beast brother!
My advice use small screw turns at a time and don't try to torque the bolts.
But that IHS is definitely the weak link when it comes to cooling the i9s. Delidding or Chilled is really the only way to stop it from throttling under heavy loads when overclocking.
You're gonna get great Temps without having to faff about with insulating your board or possibly frying it from condensation.