I had a few Erica Synths modules and big 20% discount this week made it great time to finish my Erica focused rack to fill my empty Doepfer 6u case to use with the 4u palette Endorphin.es case and my other two small cases. My build so far:

ModularGrid Rack

I already had an extra Pamela New Workout, Maths and WMD attenuator and the Black Wavetable oscillator and Polivoks filter so now can work as a great supplement or stand alone. Sweet spot for small rigs is two rows of 84-104HP to get basics needed (clocks, sequencer, VCA, attenuators, mixers, etc). Any smaller than that you miss the key essentials.