Are the rivet nuts steel or ali.
Are the rivets off go quality.
I am using ( Emhart Teknologies Pop Nuts
Steel ) and my tool is made by ( Gesipa ).
All the rivet that i have put in to the chassie are tight I think my weight mite be helping a bit ( 20 stone of force is quite
HEAVY
)
I did find that puting the rivet nuts in the tank to be a git the tank was bent a bit by the time the rivet nuts were tight had to straighten tank out afterword.