"That's why they don't have the 'bumps' for the MG131, the whole cowling 'balloons' toward the back. I'm not saying that the modeling is correct, but I think that's why the K4 is modeled incorrectly and not any of the others." . Motherland, we were not talking about the bumps.
"but I think that's why the K4 is modeled incorrectly and not any of the others" - I don't think that's the reason, the bumps have nothing to do with bad modeling. And one last question? Why did you bring the "bumps" area in discussion when the problem is at the final part of the mg that is sticking out?