Fer a start, turn the TDX block 180 degrees so outlet is at the top not the bottom - prevents airlocks making filling and bleeding easier.
Second - move one of the fittings to the bottom of the GPU block, rather than both being on top. Same reasoning as above.
Radiators - gasket goes between radiator and fans. How you mount 2x PA120.3 rads to that case - not a clue. You'll have to be inventive. Personally I'd tell him to buy a more suitable case for dual 120.3 loops. I'd also check whether those fans will give the radiator enough capacity for the heatload on each loop.
Safe guess is he's expecting 1x pump, 1x reservoir and 1x rad for the CPU, and a separate loop of the same for GPU.
Throw the flow indicators out - they're useless and just restrict flow.
If CPU is a quadcore, then put the NB on the GPU loop. If CPU is a dualcore, put NB on the CPU loop. Put hdd blocks (foolish purchase) on whichever loop has the lowest heatload.
Chipset block will need adapters to adapt it up to the same size hose as everything else (they come with the mobo), or you need to swap fittings out on everything else and replace with 3/8" fittings. 3/8" hose will stretch over the pump if you soak in hot water for 15 secs.
Order of components in the loop makes no difference. Pipe it up in whatever order uses the least amount of tubing routed in the cleanest way.
Should only need 1 n' a bit bottles of coolant per loop... rest is spare.
What would you use etc..
. There is about 1500whats of cooling there
