Eber Wright is one of those Flight Safety guys with too much time and too few facts. He can call me to get this one straight, after all, I was there! This bulge crap is an old - wrong- wives tale. The need for a mixer on the 76 was dictated when the delta three coupling was added. I was on the team that did so, and would be glad to provide the details. RJSquirrel is right, the mixer is not a source of black magic, nor is it at all likely to cause a problem.