[Platypus2]

And can you use the internal pulse eight HDMI-CEC? or should I go external just to be safe?

I have the external, I have no idea if there is enough space to get the internal one in...space looks tight. Obviously the wise move would be to just wait and see, but something tells me from the pictures I've seen it would possibly be a struggle. The communication from pulse 8 is pretty good, so I'm sure they can let you know sizes.

Does this not suggest there isn't enough space ?

Unfortunately, there isn't space in the stock chassis to mount the Pulse-Eight internal CEC adapter so a custom enclosure will be required to get the most out of it.