Gopher, getting GREAT results with my Def 4s on Symposium Acoustics "half" Rollerblock Modules RMK w/HDSE ball bearings on Svelte Shelves.
Good luck lifting the 4s onto the Sistrums! Hernia- or prolapse disc-inducing, the 4s are the most user-UNFRIENDLY spkr to lift I've ever had, combination of weight, deadly Al base and sharp edges. The RMKs just so easy to place under the 4s with minimal lifting.
