The last model in your first post has some dodgy topology in the base. You have a bizilion sided n-gon on the top which needs to be fixed. You may as well fix the triangles on the side while your at it. They don't matter as much, but depending on where it is and what its doing, triangles can cause serious problems when animating and/or importing in to a game.
You might also consider connecting that strut to the base rather than just intersecting the mesh.
Can we get wire frames for all your models?
"Three o'clock is always too late or too early for anything you want to do."