For ease of use I reccomend the Novak goat brushless setup. The Novak fifty-five crawler setup is also a really nice setup, but the Novak goat brushless setup is A LOT nicer. I've helped two guys build their crawlers, and both guys went with the novak brushed setup at first, and now they both wish they would have spend a lil extra money to buy the brushless system, because they're going to want it anyway and that's money down the drain.
http://eastendmachining.com/nogocrsybr.html
http://teamnovak.com/products/esc/55_turn_rooster_combo/index.html
I CAN'T STRESS THE NEXT PARAGRAPH ENOUGH!!
You need to order one of these lower COG battery and servo trays right now. On the axial, the only major problem keeping it from being a decent crawler right out of the box is the battery setup. With a crawler, you need the weight as low as possible and close to the axles, which keeps the center of gravity low. On the axial, they have the battery, which is the heaviest component on the truck, as the highest component on the truck, which is a VERY bad combination.
You have two choices. I run this one.
http://eastendmachining.com/axsclowcgbap.html
and I use a LiPo like this
http://maxamps.com/proddetail.php?prod=Lipo-1100-74-Pack&cat=82
The other choice is using these two components, if you want to use nimh instead of LiPo. I HIGHLY reccomend LiPo, as the batteries you'll need only cost like 20 bucks in LiPo anyway.
http://www.ckrccrawlers.com/shop/index.php?main_page=product_info&cPath=94_76&products_id=690
http://www.ckrccrawlers.com/shop/index.php?main_page=product_info&cPath=24_50&products_id=692
With the Novak Goat brushless system and a 2000 mah LiPo battery, I'm getting somewhere close to 2 hours of run time on one battery. The power and torque is amazing, and the wheelspeed is incredible.
Do you happen to have a mamba max ESC for any of your other RC's? If you have one already, I can tell you of some other options that youd be cheaper but just as good IF you already have the mamba ESC.
For your servo, a
HiTec 645MG will be plenty to get you started, and can be had for about $25 shipped. I reccomend buying this servo and applying the money that you save towards a brushless setup.
Check out what Joe at
www.eastendmachining.com has to offer. He offer special discounts to RCNT members, and he has THE BEST customer service that I've found in the industry. It's been a pleasure working with him, and he always goes out of his way to give me discounts and include special lil bonus parts in each order. In fact, I just bought my second ax-10 kit from him.