Luh

Hi everyone. I am using 3 projector blend on a wide screen and all outputs go through the spyder x20, and the blend is being handled on the spyder. I have removed the edge blend on the watchout, however i am certain if I've done it correctly because i get a black line between the blended section. What is the correct way of removing the blend on watchout and how to reverse the one i have done and saved already? Thanks