I also own a Viol Ruina. I hated it for quite some time, because it behaves strangely, most often. I had the same problems you described. And yes, the filter out is pretty low volume. You basically need the Mangle to push the level up. I had the module laying around unused for months, before I gave it another chance. And then somehow it clicked for me. Now, it's an integral part of my core setup. I mostly do parallel processing with it, as I can control the amount of crazyness it brings with it, that way. I know how to push it, to get what I want from it. But I'm sure, there's even more, as it is such a beast, in a positive way.