Originally Posted by YoDog

You got a great deal!
The E4 is a very good car especially if you intend to run a modified motor. The main things you should get are extra universal dog bones and the new PU belts. Wolf hobbies has plenty of parts in stock not to mention the hop up parts that he makes for the E4 cars. There is still plenty of support available, the car is just a bit behind on performance vs some of the others on the market. If you intend to bash around in a parking lot most of the time, the E4 will be just fine. Like any other TC, you will break it if you hit stuff hard. One of the main things to be careful of is to limit the steering throw to a reasonable angle so that you don't bind the shafts and the car is plenty durable.
I ran the entire RROC week without a single breakage. I was just not fast enough to get into the upper mains.
As far as batteries go, most will fit with the use of my LiPo battery trays.
The upper deck can be spaced up a couple of millimeters to gain a bit more space.
I ran the Fantom 5200/50c pack with room to spare.