Hey GhostNova, do you intend to fix those attachment issues you mentioned? If not, is there any chance that you could upload the original Blender/Max files, so that other modelers could try to fix the issues? Many of the models throw errors when I try importing them into Blender or 3ds Max, making it impossible for me to fix them.
EDIT: I have so far managed to fix issues with both the Sentinel and Annihilator, using Blender. I would fix the Flayer, but it throws errors when it tries to import and instead imports nothing.