well the chances are you're not going to be able to fit everything you want in a 48hp and there's more bad news - that 380mA - I'd really only advise around 300mA of it... otherwise you'll probably end up with start up issues (when beads tries to take more power during startup - but you might be lucky) - they're really only designed to hold a few low voltage analog modules & they're really over-priced imo - a mantis is almost 5 times the size & over 6 times the available +12v for less than double the money & you'll need that extra space and power, sooner than you'd like to think!
better to plan your case around the modules that you want (& actually need to support them) than trying to cram too much in too little space
but for now - swap the happy nerding 3mia for the 3vca and then get some passive attenuators... and then buy a mnatis...
"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