On an .stl model, how do I change the size of the left hole to be as small as the right? I have zero modelling knowledge, and I just want to change the size of that hole. I thought it would be as simple as downloading blender or some shit and using some circle resize tool, but apparently not lmao. Any help would be appreciated, even just telling me another 3d modelling general on another board where I might have more luck, thanks anons.

On an .stl model, how do I change the size of the left hole to be as small as the right, so that the heat insert fits? I have zero modelling knowledge, and I just want to change the size of that hole. I thought it would be as simple as downloading blender or some shit and using some circle resize tool, but apparently not lmao. Any help would be appreciated, even just telling me another 3d modelling general where I might have more luck, thanks anons.