+1. This is why the incorrect information must be corrected. Sure there are ways to "take the easy way out" to do something, and when pressed for time we all have at one point or another. But unless the person asking for information requests the "cheapest and easiest way regardless of the end result", you cant continue to argue with the correct way to do things. Geometry PROVES that having the servo horn at 90 deg to the steering arm is the correct way to set your steering, due to equal steering throw left to right. This isn't an opinion. An opinion is "this works for me".

On bearings, I have always used the cheap metal bearings, removed the grease, and used a little Elf high speed oil. They last a decent time and aren't expensive to replace. I have 1 or 2 of each size in my RC box, to replace in an emergency.

Also spend time to ensure your not pinching the wheel/hub assembly when you attach the wheel. make sure you have at least one small shim between the hub and the bearing. Little things like that can make sure you have minimum friction on the rear wheels.