the numbers of vertices/faces is not a problem,the .GR2 editor get make the work to optimize the files
edit:for the radar dials,i don't understand
the SH4 dials.cfg don't have the entry for them (type :58,59,60,61)...
Ps:the .DAT file contain just the 3D objects and textures,and not the controllers (they are in .sim)