For the price, the Mammoth is awesome. Its scary fast, easy to work on, and handles pretty well for a Monster truck. I have one and have only used it a couple of times, but its a blast. Have you ran your X-Factor yet? Those are wheelie crazy machines! The Mammoth wont wheelie because of its long wheelbase and basic design. I have thought about getting an X-Factor for rock crawling because I already have a fast 1/8 scale buggy, which keeps my speed needs happy.
I might be interested in a swap for your X/F if its in very good condition.
