Nah, wouldn't be too extremely difficult.

For running in water about as deep as the tank in schutzstaffel's pic, you'd need to relocate the power switch and speaker volume knob to somewhere higher on the tank (as these would let water into the hull) and seal the battery compartment. Then you could put Goop on the miscellaneous openings in the hull such as suspension mounts and the like.

Thanks for word on the Tiger's wheel caps, schutzstaffel. Was unaware that they were there and also hindered removal of their respective sprockets. Theoretically the Pershing should also have a similar "hub cap" to be accurate and scale but it doesn't.

-Harq