I don't understand why it is so hard to come up with true, complete yes/no answers to adjusting the OM617 IP. Nobody can find a manual on the IP, the MB FSM does not go into deatil of IP adjustment, and nobody can seem to document even taking off the panel of one!
I bet if sombody will take the time to go by a fairly large diesel injection shop, they would be happy to give you a photocopy of the full-load adjustment procedure (With a little begging, promising not to misuse it, and $$$

)
I know we have the OM603 IP picture, but I bet dollars to doughnuts they are not exactly alike and somebody will F-up their pump by turning the wrong screw using the 603 diagram.