Above is the how the gear is currently installed in my case. I had this working for two years or so and needed to replace the CPU (dead) and added a new Mobo so could get modern CPU.
Previously when I drained I had the drain port at the bottom coming out of the front radiator. You can't really tell but the tube would have to go up and over the case lip so it was actually somewhat higher than the port at the bottom of the radiator. My previous loop had much too much tubing and now, feeling a bit more confident, I think i will get some angled fittings and make it tighter.
In any case I was thinking about setting up the loop like in the photo.
Question 1: Is there anything wrong with going Pump - GPU (x2) - RTop - CPU - RFront - Pump?
Question 2: Should I flip the front radiator so that the lowest point is the pump outlet (it would be) and add the drain port there? Previously when I tried to drain the loop it was a disaster - water got caught everywhere. Would that be better?
Question 3: When you drain your loop do you use the pump to suck out all the fluid? Do I need some sort of vent at the top? Do I just open the top of the Res as a vent? Do I build a vent?
Previously I ended up unplugging it and just taking off all the tubing which sucked.
Question 4: If I do it as in the photo the GPU outlet hose would have to have some play because it would go over the memory modules - other than aesthetically is that a big issue? (I dont' mind the aesthetics that much)
I know some of these questions are basic so appreciate your patience.