Is there enought internal space for this adapter + module or would modification be required? I imagine it would be pretty tight, especially after adding cooling.
Are you talking about the official MNT adapter or something else? I saw the official adapter with a banana pi CM4 at Teardown a few weeks ago and it fit just fine with a new style of heatsink. If you are talking about something else can you link to it?
I am referring to the official MNT adapter.