‘(...) I'm going to extend my rack to another 3U of space’.
Honestly, investing directly in another RackBrute 6U would be wiser...
-- Sweelinck

or better yet a mantis or a doepfer lc9 - best bang for buck cases (price/hp), excluding b-company clones - and no rack warts stealing valuable hp!!!

"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia

Utility modules are the dull polish that makes the shiny modules actually shine!!!

sound sources < sound modifiers < modulation sources < utilities