There are side elevation diagrams in Rakov (Russian p 270, but better
in the German translation version p188) for the locomotive only, but by
far the best plan is in "Lokomotiv-Athleten" (Giesl-Gieslingen, pub
Slezak), which also shows the tender and gives dimensions in imperial
measurements. The latter publication also has two rather poor
photographs of the beast.
Note that the middle three driving axles had flangeless wheels and
there was some side play in the other axles and coupling rods.
Whether a model could negiotiate metre-radius curves is another matter!