I have identity confusion so I just wanted to share my e-slayer that I installed the summit tranny and locking diffs in. Here are the build details in the slayer forum:
Here's the final picture w/ a body, sporting hb rovers (they work much better than the lizards) and the carbon fiber chassis. That brings the total weight (minus battery) down to 6lbs 4oz. With battery I'm at 6.75-7lbs (3.3-4A).
For me this car is much more entertaining now that I can switch from high to low and lock/unlock the diff from the transmitter. Thank you Traxxas for making your cars so universal.