A spring or a rubber band will never be able to pull a servo back to idle if the battery fails (give it a try and see!). All they are good for is if the actual throttle linkage were to come apart. Best way to stop a runaway nitro engine is to stick your finger through the hole in the body and squash the plastic air pipe just after the air filter.
The thrust bearing works the other way around - if it makes a noise when the clutch pedal is down then thats the thrust bearing, if you can hear the noise when you are driving along then its some other bearing within the gearbox.
NDOR is open Saturdays and Sundays from 10am till 5pm, we'll keep the Sunday opening going until the end of the summer but we are open on Saturdays all year round.
Losi's always have slop in the suspension and steering. You can reduce it by replacing absolutely everything but then they don't handle! Many people will tell you that Losi's run better with sloppy suspension.
I guess if you are just going to hack round a field then handling isn't really an issue perhaps.
I wouldnt attempt to start my engine without pre heating it (it's had four litres through it). You waste fuel letting it warm up plus it's incredibly bad for the engine to run it cold.
You need to measure the bore diameter then we can perhaps get an idea where that metal came from. I've never seen a engine seizure that's left the piston skirt looking almost undamaged like that one appears to be. Are the bits on top of the piston steel or aluminium?