All this planning on my push/pull config for the h100i fans is really making me think about layout and cable management. I went looking for a Y fan splitter cable which would basically let me set up push/pull with 4 fans. Turns out I bought the same black cable 2 years ago for my current build so I only need one more. 7 dollars saved. Ordered the other one just now so I will be all set for push/pull.
Because my case layout is a bit poor, my cables are pretty untidy. I got some zip ties to help with that so they don't get in the way of the airflow. I had to get those splitters as well as an extender for another fan. Some of these smaller parts can be pretty cheap on eBay with the buy two get one free deals. Always good to have spares!