It seems that the position/distance of the extruder mounts on top of the AH have changed since v72, so the WW-BMG unfortunately won't fit anymore. It would be great if @cyph3r42 (or someone else with proper CAD skills) could fix this.
WW-BMG is only compatible with the Sharpa version of the main body. This needs to be made clear in the docs and should also be represented in the configurator (which currently provides the O2 main body, if I select WWBMG as extruder).