Just installed the "can-bus" on my morimoto kit, with the HD relays. Works perfect, no issues so far.
So for those ordering the morimoto kit from retrofit source, be sure to order the hd relay kit AND can-bus.
Took about 3-4 hours to install, but could probably do it now in 1.5 hours.
So far the difference is amazing, much better than stock lighting, especially on high beams.