Looks like the facing is wrong...the ship is pointing up
Also, the ship center is OK, you didn't check the axes..thus, you made the sphere far larger than it should be.
Say, what did you to to make that plugin work? I don't want to bother you with constantly converting things for me.
I uploaded the fixed 3D Max scene to the same folder as everything else. If you can run it trough the converter again I'd appreciate it.
Unfortunately, I have no idea if the scale is going to be OK. I added another file, ship_facing. The scale of that fighter SHOULD be the guidilne (as I used that one when I converted other ship) but I'm not 100% sure.
B.t.w. - the super huge turrrets are done. Screenshot will come soon.