Maybe I missed something, but was Wolmarans trying to show dispersement "pattern" or simply that the splinters in the arm could only be there if the arm was within 6-60 cm (I think this was his figures) of the door and not right over against the wall where Mangena's theory puts Reeva at the time of the arm shot.
Because if W wasn't trying to show pattern merely the existence of splinters only up to a certain distance then I don't see what point Nel was trying to make about whether it was done on feather board or paper because surely so long as W has shown that there could only be splinters on the arm wound it it were within a certain distance of the door then IMO he has done his job, i.e. to raise a very reasonable doubt that Mangena's theory is correct and therefore a reasonable possibility that the gap between first and second shots may also not be correct, or at least not a gap as long as the State's case requires for the screams and mangena's theory of the sequence of events.