my Brain Slug version works fine and EBB is around 36°C that really nice..
Fan is mounted with heat inserts for M2.5 and M2.5 screws with 8-12mm length
Every time I look at it I think about this https://futurama.fandom.com/wiki/Brain_Slug
The author remixed this model.
edited only cable_door_PCB_EBB_SB.stl
added a fan but in an angle so that the stepper also gets cooled ..
i gots many of jams and clogs because the stepper was overheated .. now all is fine