Went nuts:
Oh, holy crap...what all did I do to this build? Well...lessee...
First up, I reset the cases. Since it was clear that the desired cabs were Intellijel format on the one tile row, I simply opted to put an Intellijel 7U up top, then a Palette 104 down below. Not only did this make the build a bit easier, it added a SECOND tile row, plus the Palette utility 1/2U row. Once those were chosen, I could then eliminate the 1/4" I/O tile since the Intellijel cabs have 1/4" jacks (four, actually). The extra row also allowed me to put a pair of the mono send/return modules on the lower tile row, above the WMD mixer...which means you can use some rather complex outboard processing in stereo if you like. Plus you get some extra buffered mults and a couple of precision adders on that 1/2U row on the Palette.
Then I really dug in and tried to shrink some things. First of those were the sequencers...which although the new ones fit into a smaller space, they actually have MORE in the way of features than the Ericas. For example, there's a Rene/Tempi combo on the bottom (flat, so that it'll work better as a mixing/controller row) cab that not only gives you loads of clock modulation, you get six channels of clocking AND the Tempi still connects directly to the Rene, keeping all six of those clock outs free. And the Rene can also double as a manual controller, too. The drum sequencer got switched to WMD's very potent Metron, with sixteen output channels and a whole lot of other tricks behind its little aluminum panel. And THAT move then allowed me to revamp the entire drum section, with solid kick, snare, and hats...and also Delptronics' electro pairing for another several analog percussives (with CV!) AND a 4-channel sampler/sample playback module that also takes SDs to swap out the audio files. But let's go into this thing row by row...
TOP TILE ROW: This thing's got some new CV trickery, so first up is a buffered mult because that just might be useful in this, with the several VCOs and what-not. Next is Intellijel's Noise Tools tile, which has a potential master clock, sample and hold, and slewing. QuadrATT and the VCAs are next, then there's that first Pedal I/O so that you can add a basic mono effect such as flanging, etc.
FIRST ROW: Konstant Labs PWRchekr, because while you can "see" the DC rails in the Palette via its indicators, the 7U doesn't have that amenity in clear view. But now it does. Four LFOs and four EGs next, via the excellent Xaoc Batumi and Zadar, which both have their expanders here. Then the Hel expander gives you more CV ins for the Odessa, making it also quite useful as a chordal pad source. After the Odessa, there's some real fun from LA 67 with two VCOs that offer variable waveforms under CV, using a circuit like that found on the RSF Kobol VCOs. A Veils clone deals with level control/mixing for the VCOs as desired, and note also that you can "break" the mixbus on there so that if you wanted two VCAs for the Odessa and one each for the LA 67 VCOs, that's as easy as plugging in some patchcords. Then the Morgasmatron (good pick!) and the FX Aid XL. This row is basically the "voice" row, with a potential of up to...get this!...SIX separate voices (4 CV ins for the Odessa via the Hel, one each for the LA 67s).
SECOND ROW: This is mainly drums. The Disting is first up, then the Metron. Two Frequency Central modules handle the kick and snare (with some useful CV ins), then the Tiptop 909 hats...and then there's the Delptronics modules. The left one is the "voices" and the right has various CV ins for controlling the circuits in the left. All of these point back toward the fine electro sound of the early Roland stuff...CR-78, TR-606 and 808...that sort of thing. Then, not satisfied with just one sample playback module...now there's FOUR via Squarp's Rample. The drum submixer is by Paratek, giving eight ins with stereo panning over all channels. Then next, there's WMD's stereo take on a resonant EQ, with morphing capabilities...perfect for timbral tampering with the percussion! At the end, another Frequency Central module offers mono-to-stereo capabilities with chorus, tap delay, and reverb.
LOWER TILE ROW: That first thing is derived from Mutable's Peaks, but with some extra potential modulation mayhem. Another QuadrATT next, then another FX unit...this one's the Intellijel tile with some similar capabilities to the FC Stasis Leak in the second 3U row, but this also lets you time the delay from your clock. And then the pair of Pedal I/Os which connect directly to the Palette's 1/4" jacks.
THIRD ROW: Nope, no joystick! But...see that silver and blue thing with the D-sub? That's the module for Monde's RIBBON CONTROLLER! Yeah, baybee...put a big ol' long 9-pin D-sub on that and wade out onto the floor while sending the modular lots of possible craziness. It worked for Keith Emerson, after all. Then there's the Tempi/Rene combo, which you can use all sorts of ways. You can kill the clock and use the Rene as a 16-plate controller, or clock it and get one quantized and one unquantized channel, also with a pair of gate/trig channels. And you can have that AND interfere with it while it runs, too. This is quite different from the earlier Erica sequencer in that you have many more control possibilities with the Rene. After that, I put in the WMD's mute expander (now you have touch-mutes on ALL of those channels) to get some more mileage out of the Performance Mixer. And at the end are your D-sub send/returns.
Now, you could theoretically toss the buffered mult tile (and that 2 hp blank next to it) and replace it with a 10 hp tile of some sort, since the Palette's utility bar has three of those in addition to your adders (from which you can derive some of those extra CVs the Odessa wants with a little DC offset magic). I sort of left that open. But as for the rest of this, it's LIKE your version...but pumped up on lots of 'roids!
As for portability, what I'd suggest is to get over to your local outdoor sports big box and look into some deeper, cube-foamed ATA-type gun cases, sort of like the expensive SKB keyboard ones without as much of that expense. Futz around with the foam, and you should be able to fit BOTH cabs, power bricks, a few pedals, and some patchcables into that one case. You could even get one that's carry-on sized and much of this will STILL fit, although that might necessitate putting the pedals in a separate gigbag. Either way, this should travel very well in something like that...even if you're traveling out of the country and schlepping everything yourself.