If you choose to accomplish maintenance to your Polini 911 GP4 Reverse then it is always recommended to possess a Workshop Manual to keep just for reference should you want to know the best way to strip off a specific part for instance the Gearbox and fit it again safely.
Polini 911 GP4 Reverse Workshop Manuals gives you special diagnostic wisdom on your car therefore if something is faulty it helps you ascertain what the issue is and the way to correct it. Then you are able to decide if this can be achieved on your own or in case the job is simply too big you can book your 911 GP4 Reverse in to a suitable garage.
Polini 911 GP4 Reverse manual