I had my injectors tested by Richard and added to the injector cal list, he has added them at 3 bar base and 5 bar. I have run out of injector and would like to up the pressure to 4 bar base. I have the pump head room for 4 bar but not 5 bar, can anyone tell me if its just a case of picking the median numbers between the 3 and 5 bar test results and adding it to the list or will the injectors need to go back to Richard? I have tried to call but just get sent to message bank.