The Shift X

[spongy21]

Backstory first: Last week I bought a phanteks Enthoo Evolv Shift X. I would have bought the Evolv Shift if I did not already own an H100i v2, but since the smaller case cannot support the 240mm radiator, I had to buy the skyscraper. 

 

Question: if I wanted to replace the tubing on the h100i v2, could I?... And could I add a resovior if I did.

 

Question 2 if the first one is dumb: Watercooling, what parts for under 300 USD

 

UPDATE: I have an NZXT manta, I will add a photo of the size comparison in a couple of days.