Since you have a 4800, a 32 channel snake might be a better solution. 1-24 into your DM, 25-32 for external preamps, DIs, or line level inputs.
Or, even better, a 48 channel snake using DM's mic pres (1-24), two 8channel ADAT converters with mic pres(25-40), or that Ferrofish 16 channel converter from the other thread that you hook up external mic pres into (25-40), with room left over for 8 more channels that could be part of a patch bay an Analog IF-AN/DM card combo.