There is no jumper on the inside for the model being discussed by the OP. IOt would simply be moving the wiring for that leg of the crossover to the same posts as the the other. This would not be a permamanet move (IE it could easily be reveresed.). It also is not complictaed. It can be done by removing the terminal cup alone. This is what i was geting at with my last question to DK. His answer indicates he has discussed his reasoning on this already but i currently haven't gone back to look at that. My thought would be like Face; no jumper should be better; 1 less item/ point to introduce any artifacts.