I love it. Simply amazing how it pulls through deep and loose snow. Can't be with stock motor. Mamba 4600? What batteries are you using? Any snow inside the chasis after such a run through deep snow? How well does it cope with brushless? Any additional wear (diff, plastic spur) so far? Any weak spots which needs reinforcing? I guess the stock diff gears are made of plastic not steel? Any troubles with motor temperature since it seems to be a closed chassis?
I saw one with nitro motor but i remember it beeing way slower than yours.
I should get one myself and replace the stock motor with a mild brushless system.