Yeah, that's what it is. I never noticed that it sort of looks empty lol.
Yeah, a bit of empty tubing would certainly cause a problem.. I may be new to water cooling but I'm not THAT dumb.. ;)
Well I guess I'll toss mine up here. Just added the water loop to it. It's not quite finished at the moment, the pump will be turned 90 degrees toward the interior of the case so the outlet line won't cross in front like that. I'm also going to add a NB/SB block and a 120mm rad on the rear...