Having excitedly taken delivery of my first model tank I got everything charged and set up. I was impressed by the heft and overall look of the model and took a few photos while the battery charged. I didn't really have any idea what to expect when I turned it on for the first time as I have not seen one of these models first-hand before but from a layman's point of view everything started off fine.
The sound started up, as did the smoke unit. I didn't expect the latter to be quite so noisy but the wisps of smoke wafting out of the rear of the tank were nice to see.
The tank took off across the grass (I didn't expect the gearbox to be quite so noisy, either. It's the metal one so presumably a good bit of lubrication might help) and everything looked to be functioning until a minute or so in when the model stopped responding. The sound module was still making a noise but there was no response from any of the controls.
Turning the tank off and back on again resolved the problem but it again cut off after about a minute, This was repeated a third time, after which I stopped trying to get it run and came here to ask for advice - for fear of damaging the thing.
The "customer" in me thinks; "Perhaps I ought to arrange for a replacement" but the former avid RC-car owner in me wants to get inside the hull and check things out. From a completely layman point of view it sounds to me rather like a wire on the RX18 is loose but of course I don't actually know. It could be something like a faulty RX18, an over-tightened gearbox assembly or even a rogue moose for all I know...
Could someone shed some light on what they think the problem might be? Is there a sufficiently small risk of damaging the tank by taking it apart that it is worth getting inside it to look for loose wiring instead of thinking about a replacement?
I'd obviously like to get the tank working properly but I don't want to risk making things worse by barging in to things blindly

Thanks in advance,