Do you mean the 12031? The full metal Tiger? I not only have that exact tank (mine now runs on an IBU2, 9X TX and Impact apple) I have three other Imex Tigers, two that have always been full metal and one that I had a great time turning from all plastic to almost all metal. I tend to concentrate the metal in the lower hull and I'm slowly going back to plastic turrets. Once they're painted you can't really tell, sometimes the plastic actually gives you better detail, and i just think it's easier than doing all that bracing underneath.

In fact, here's a video of the exact same tank as you just bought, but after I put in the IBU2.

https://www.youtube.com/watch?v=p3TMYh25PW0 The tank behind is also an Imex Tiger, but that's the one that started life all plastic and now is mostly metal and runs on the Asp and the 9XR Pro, and that's the tank providing the voice and music while the engine start and drive away is the IBU2.