I bought mine a few weeks ago. I decided to race it on our off-road circuit and I was very impressed by it's performance. The truck got into the A-main using mostly stock parts. The only modifications that I did was to replace the tires for GRP Grips, changed the rear diff oil in the back for a thinner one (which really does not needs it since it has tons of off-power steering), gave it another degree of toe in the back with the included inserts, replaced the stock servos and radio and finally, dialed some camber on both rear and front tires. After that the truck was handling very good.
It would be great if Robitronics could update the engine mount. After inspecting mine after the race I notices some cracks in the extended part that doubles as a stiffner. Also, I would probably change the upper diff halves for a stronger material.
The set-up used was as follows:
Shock oil: factory (30wt.) used
Diff oil: 7,000 Front, 15,000 center, 3,000 Rear
Camber: 2 Front, 2.5 Rear
Toe: +1 out front, -3 in rear
Tires: GRP Grip front and rear