Ran mine at the track all day today, I'm very happy with the truck. As many have said the sway bars are definitely necessary and I'm still scratching my head as to why they didn't include them in the kit...
I ended up building a 2mm rear bar with some piano wire and some spare sway bar parts from my SCRT10. It made a world of difference!
Tomorrow I'll be doing some work on the limiting of the shocks as well as a some different oil combos and maybe some piston changes.
Right now I've got 5k in both diffs and I think it could definitely use something thicker, especially in the front. The book says that there's 30 in the front shocks and 25 in the rear... I have no clue what kind of oil that is but it's nothing like the Losi 30 - 25 I've got in there now. Whatever it was it resembled something similar to water.
As far as electronics go, I've been running a SXX TC V2 with an Orion 8.5 and it's great on power all the way around although I'll be adding a 6.5 when the new Orion motors are available. I've geared the 8.5 with 16 and 17 tooth pinions and after 8 min of HARD driving I couldn't get it any hotter than 140. After 15 minutes of hard driving the hottest I could get the motor was 160.
There's no question that the 540 motors work awesome in this truck. Personally I hate the way the 550 motors feel. I'll continue to keep running 540 motors for the life of the truck.
My only complaints is that I wish they would of made it a little easier to access the diffs since diff tuning is so crucial in any vehicle. Also the shocks leave a bit to be desired but all of my other cars are Kyosho's and nobody builds a shock as good as Kyosho.
This is hands down the best 4wd Sc truck in my opinion, they drive more like a big 4wd buggy than a SC truck.
All in all my hat's off to AE for building a REAL RACE truck, I can honestly say it was worth the wait. I'm more excited to see how good the truck can actually get because out of the box it runs damn good and there's still a ton of room for improvement.