the original ZX5 is a very capable car. spares are cheap, and once built correctly the car is robust and reliable. TO echo Dibble's comments, it may be worth going straight for the full ZX5, not the RTR, as if you get the bug you will start upgrading straight away and spend far more in the long run.
Have a search in the Kyosho section for build tips for the ZX5. The main things were upgrade the diff balls straight away for associated or similar as the kit balls are soft. Get the front alloy hinge pin brace so you don;t snap the plastic ones in every minor collision, and double up the front shock tower with an atomic carbon mount sandwiched against the kit item. This will make the front end bullet proof in a crash.
Apart from that the car will be competitive at club level, and regionals.
Make sure you shim the diffs correctly also when you build it. The instructions make the gears a little loose, so they can strip easily unless you run a loose slipper. Move one of the thin shims from the inside to the outside of the diff to tighten the mesh slightly, and make sure the slipper is set for a small amount of slip from a standstill. You won't have any problems then.
anything else, just ask
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