That's basically a problem area to work with since these original hull surfaces didn't align very precisely here like I was talking about earlier above:
This area at the top of that juncture now has problems with edges not meeting up with each other very closely and that kind of loose tolerances will tend to increase "glomming together" in intersections through those spots.
If you're going to be doing more stuff along those joining areas then it's good to get them aligned cleanly from earlier on, it helps to avoid problems further down the road.
OK, thanks. I moved it away from the little parts as it worked. However, on another part, when I boolean, it suddenly deletes the structure for some reason! What happened?
> However, on another part, when I boolean, it suddenly deletes the structure
> for some reason! What happened?
If you post the model I can take a look. It's hard to guess what might be going on without the model.
But it's probably related to those problem spots with micro faces and edges that don't connect to each other very accurately like I was talking about above.
gord_surfaces_not_aligned1.jpg