I have been inactive on this topic for a few weeks because I wanted to spend some more practical live time with everything over a variety of situations. I now have that and can better speak to my original inquiry. I have five more live jobs on this system on three different PA setups and things have improved for us every time. The first thing that made the greatest difference was making a significant change to the size of the signal coming into the transmitted which has added significant headroom to the receiver side signal and has reduced the instances of the limiting coming into play. Part of the gain structure was a more careful use of what instruments are coming back. Low toms were awful, cutting those back paid instant dividends. In fact, an overall lowering of the drum set in general was helpful. With my personal PA I am still working with the overall in head bass tone but in working with out regular, for hire, sound guy and his system, last Friday presented one of the best overall live mixes I have ever had. He just added an Allen & Heath Qu-32 digital mixer so I am sure that has a lot to do with it. But the quality of the in head sound with some basic Shure SE-215 was really good. I sold my Westone UM Pro 20 dual drivers and returned to eth SE215 because there was not enough difference between them to warrant the extra cost. So right now thinsg are looking up for this working as I had hoped.