I need to upgrade the CPU cooler for an i7-8700 on my HP Z2 G4 Tower Workstation. The HP case has builtin struts for mounting both the Mobo and CPU cooler which can not accommodate any backplate or back mounted screws or else the mobo won't fit back into the IO port openings on the back of my machine. The current stock cooler screws directly through the mobo into the builtin struts. These struts can not be removed without a torch or grinder and are far more stable than any backplate. HP Parts are absurdly expensive and they typically send the wrong part 4 out of 5 times. AIO water coolers are also ruled out because the back of the tower only accommodates a single 92mm case fan. My initial survey suggests the DeepCool Gamaxx 400 Evo might do the trick but I'm concerned about reports of this cooler's unstable mounting system causing excessive vobration & fire hazard. Looking for a list of CPU coolers that screw directly into the case struts through the mobo