If you have to execute adjustments for your Vento Zip r3i TurboCam then it is usually recommended to have access to a Workshop Manual to keep just for personal reference in case you want to know the right way to take off a particular component for example Wheel and fit it again the right way.
Vento Zip r3i TurboCam Workshop Manuals will give you specified diagnostic details for the car therefore if something is not working it will help you discover what the issue is and the best way to fix it. You can then evaluate if you can do this by yourself or if the job is simply too big you can actually book your Zip r3i TurboCam in with a trusted friendly mechanic.
Vento Zip r3i TurboCam manual