FIXED! (see reaction) Epoxy can indeed stand the heat, however it’s quite brittle, therefor the glue can break loose. But it’s not bad, and as there will be no UV light near the glue, you can try off course. As I probably have the same issue with mine, I personally will try to see if I can re-solder a bolt to the original spot on the motherboard, or otherwise try the bolt arrangement. In case I can reach the back to use a press-nut from the back, I might try that. 2 things: 1)when touching anything on your motherboard I recommend you earthen yourself, so your static energy cannot shock anything on the board. You can Google how to do that;) 2) I will replace the cooling paste when doing this fix and recommend to to that. ps about drilling a hole in pcb’s: the silicium of the PCB can make it a slow process.