The way the Realist is constructed, I'm surprised there aren't more failures. The one I saw the guts of (it was dead and had been disassembled by a lutheir) had a couple of brittle piezo elements sandwiched between brass shims without much of any compliant material to protect them. You get good coupling that way, but the elemenst are indeed vulnerable to the stress. There's some material around the elemenst which does take some load. I think the way to make them last is not to fiddle around one your Realist is in place.