So, here is another one sort of bug report.
Issue: new (revised) tank can be cracked causing pressure problems and therefore tuning issues. Crack is so small and located in unobvious place making pressure test close to impossible.
How to repeat: side impact slightly above pipe line where most stress is taken by the outer rear fuel line clip.
Result: screw holding clip causes crack of the tank body starting from the screw' hole.
Major issue is about unstable nature of this damage: with body off and clip aligned well there is vrtually no pressure leak. With body on it applies some force to the clip, and not so soft landings temporary increases this force. While buggy is being upside down force is high enought to remove all pressure from the system and cause flameout.
But when you take tank off and decide to make leak test, you remove clips and screws also. or at least don't apply force to that rear outer clip, therefore silly drivers with weak lungs don't have a chance to detect this leak.
Workaround: mount this clip facing rear left wheel or/and apply some material betwwen tank sidewall and clip.
Hope this will help.