The wiring scenario I suggested is for daisy chaining comms which negates the need for a patch box which is completely apprpriate for a DSP front three. The 511 patch box made home running comms easier.especially. when using oem Meridian cables. BNC coax cables are cheap and easy to make to lentgh so a clean installation is possible. The locking BNC connectors cannot be pulled out and master/slave cables become irrelevant. If you use the 218 in a D1/D2 configuration delays are not an issue. When you use it as a passthrough, that is when a comms return comes into play and the speaker delays need to be adjusted.

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#1 Trinnov Altitude 32-8-16, 271, 8000XE, 7200SEHC, 7200.2, Seaton F18, JL Fathom F113, Revel w990's, Kef R7, ATI 528 Amp, JVC RS4100K, SI screen. Roon Nucleus+, Eno AG, Eno M link, 218.
#2 Mark Levinson No5105, Ayre VX8 and CX8, Vandersteen Treo CT, Preamp varies.
#3 Meridian Ellipse