Might as well you pick up a case 1st, because the tube length and how you run the tubing will depend on what case you are using.

And I didn't flush mine....too excited and installed everything. But then I have took them apart countless time since the 1st day till now (about a month) due to reroute the tube, change fittings, and other little stuffs. I never reuse the water though, only the fresh one goes in the loop...should be ok ba kan?

Hmm...luckily my res looks clear inside. No unknown object floating inside. But nevermind, I will take everything apart again in couple weeks time when I swap my PC casing. Then, I will make sure I flush everything.

Flow of the water? You mean the flow direction? I have mine setup from Res -> Pump -> CPU -> Rad -> Back to Res. Will resetup when I put the GPU to the loop in couple weeks time.