I maidened the sc10 4x4 last night and am in love with it. I am a 2wd driver, this is my first ever 4wd and it is sweet.
i used a velinion system and it worked, hardly any brakes as mentioned before, the ESC got hot but didnt thermal after running the b main then bumping and running the amain (2x5min back to back).
The only pinion i had lying around was a 26t 48p! and it fitted with the supplied 93t spur. So i was over geared also.
Will sort out proper Electronics this week and start some tuning from the box stock setup.
I found the car to spin or slide out a bit to easily, i was running clicker fairly loose.
My first things i will do to tune it are.
Fit 1.3 Pistons to rear
Fit provided shock spacers to lower it a bit more (24mm maybe)
Play with clicker and belt settings to find the best setting
Trial rear tyres - caliber vs bar codes (track owner says bar codes i say calibers, but we will test back to back for our track)
All in all im happy as, lots of fun tuning this beast into a weapon, the potential is there, even the losi driver was convinced and wants an AE after seeing it and having a run with it.
Here are some morning after race pics