I have recently completed new Open Baffle speakers utilising both DEQX processors as mentioned in previous threads. Linking master-slave by RS232 + digital cabling was straight forward. The HDP-5 controls the main speakers, the HDP-3 two subs at <50hz.
Currently I have only measured outdoors at a relatively low height because of the weight of these speakers. At a later date I will re-do this at 1m height. Rather than move the entire system outdoors I used 15m speaker cables and two interconnected 7m microphone cables (to Earthworks M23) from the music room.
New images are posted in my Audiogon profile