RE: Tamiya Leopard 2 A6
The Leo2 does not go so well in snow, the sprockets ice up quickly as the snow packs on and freezes and then the tracks have trouble going around. It also does not like grass for the same reason, it clogs the sprockets and cannot go anymore or sort of just hops along straining all working parts.
If you want a tank that can handle all terrain and all conditions try the humble Sherman, my one runs after all my other tanks give up. It can even handle snow no problem.
Cheers
Alan.