one good reason for spending the bit extra and buying a real mutable module rather than a clone is the fantastic support - I had a button fail on my Marbles - and after emailing mutable it was there, fixed and back in 6 days NL-> FR ->NL
"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