I have LaScala IIs, but haven’t tried that tweak. But back in the 90s I did put slightly inflated bicycle inner tubes between the upper and lower cabinets of the Von Schweikert VR4 Silvers to very good effect. I might have to try something similar to what you’ve done with the LS.
Klipsch Lascala II bin separation
A unique feature of the newer Klipsch Lascala II and AL5 is there are two bins, top and bottom (or HF and LF bins). Recently I put a cut up Purple seat cushion between the two sections and the clarity jumped significantly. Everything is better, very much better. Has anyone ever tried to seriously isolate the two bins? Is this a thing I just never heard of or is this a commonly known deal? The improvement is so huge I thought someone out there would have sounded the trumpet long before now. Sorry if I'm late to the party.....