Shame Compustar refuses to give vehicle specific instructions to buyers

Works good but my main complaint is that Compustar refuses to give out vehicle specific instructions . You ask them and they say you need to be an official installer to get those instructions. This should be illegal, if that's the case then only sell it directly to the their official installers. They know many DIY'ers will still buy their product but they don't want to take risk of warranty work if installed wrong. Next time going to go with another company that actually gives you real vehicle specific instructions.