Tell me opinions, facts, what I should change, or if I'

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Tell me opinions, facts, what I should change, or if I'm just a baddie and should waitfag for ___.
Here's my build.
https://www.amazon.com/gp/product/B015YEI7LK RMx 1000w
https://www.amazon.com/gp/product/B007RESFR SP120 Quiets, 2x, would replace h55 and h100i for these.
https://www.amazon.com/gp/product/B00KJGYLNM NZXT Sentry
https://www.amazon.com/gp/product/B019EXSSBG h100i v2
https://www.amazon.com/gp/product/B01H263V0U MSI 1080 Sea Hawk X, 2x
https://www.amazon.com/gp/product/B00YJJBFIO 750D corsair
https://www.amazon.com/gp/product/B00OBRFFAS EVO 850 1TB SSD
https://www.amazon.com/gp/product/B018GK2G9S Dominator Platinum 16GB 2x8GB, 2x for 32GB 4x8GB.3200MHz
https://www.amazon.com/gp/product/B01NGTYV2Q Z270-A Prime
https://www.amazon.com/gp/product/B01MXSI216 i7-7700k

I've made mockups about layout in CAD, and my only concern is the dual Seahawk tubing into h55 on the upper exhaust of the 750D. Will this reach, be forced, or have excess tension?
Will the h100i tubing from the 7700k allow enough room for this?
the Z270 is a board with significant spacing around it's LGA1511, and the only measurement I could find for tubing is 11.5in on a stock h55. I have no information if this is tweaked or not on the Seahawks' assembly.
Will the stock tubing on a h110i allow this?

Here's a layout for explanation.

' 2 3
' 1 | -------- |
' | [( ) ] |
' | [5 ] | 4
' | [6 ] |
' | -------- |

1 a 140mm fan
2&3 are H55s
4 is H100i
5&6 are 1080 Seahawks.
( ) is 7700k.
Here's to hoping this doesn't get fucked by formatting once I post, and that the links work.

Is distance across z270 5&6 to 2&3 > distance to 4 on layout? Unsure, but if so that just solved all my concerns.
Photo is very relevant.

If the tubing still doesn't fit, where do I begin on making customs? I have no experience.

Comes down to a smooth 3100$ build, and it's very able to be built on my budget.
I'm first time building with watercooling and would appreciate input. Thanks.