If you disconnect the servo from the servo arm, does the servo now go back and forth appropriately? I think something might be binding. Move the steering assembly by hand and see if you can find the tight spot. Something might be overly tight, or bent.
Reverse the servo on your transmitter. There should be a switch for steering with normal or reverse. Change it from whatever it’s on to the other setting.
How's that tin foil hat fit? Conspiracy theories and all.......
Can't force others to take good advice. The person in that video is not the only person doing it. In fact, it's relatively commonplace in high power, big tire setups. Go take a swing by the Arrma Forum if you don't believe me.
I think the reason to do it is centrifugal force. Naturally, the stuff inside the tire is trying to go to the tread of the tire when spinning. Basically when you vent the tire instead of the rim you are working with the laws of physics instead of against it (as far as getting water, etc, out)...
If you are having a hard time telling if the transmission is shifting, it's possible it's doing it way to early. If so, you may have a much harder time getting it to wheely.
Do you plan to buy any other RCs that use LiPos with more cells? This information helps us suggest the right charger for you.
For batteries, I would highly recommend going with SMC. Very good value with great performance.
RCDocuments.com is another site @WoodiE owns. Lots of manuals, parts lists, etc. there. I believe anyone can upload new documents to the site. Plenty of Savage manuals already there, but feel free to add anything you don't find there!