OK, I've got my utility to the point where it rescales the vertex data in the .obj file, removes any redundant .tgo file, rescales the "R" vectors and "RootR" vectors in the .tmd file, every constant in the tmd file that looks to be mass or force related (eg, kn, dn, ktx, etc), wing section chords and areas, etc.

Haven't touched the inertia matrix yet. I don't know if it scaled by mass in the file or if mass is combined at run time.

The aircraft appears rescaled properly, but the frame rate is still <1 fps. []

Anyone know what I'm missing?

Clark