Like others, I struggled with DH Cones under my DAC and pre. Placed onto a bamboo plinth, I found that the slightest movement of the component would cause them to slip from position. Tried up, down, with/without block. Even tried adhesive (a no-no, I know). Reluctantly I returned them as I felt the seating was too precarious. (I tend to swap cables, components, etc. in and out - so my situation may be unusual.) Went with IsoAcoustics Bronze and Symposium Rollerblocks Jr. instead. No degradation to sound as far as I can tell, and I'm more comfortable with the stability on my rack (even through RBJrs do wobble a bit by design.) No doubt I'm missing something about how to seat them properly as they get raves from so many...
