MrP

Yes you can. You may have to do some tweaking but it should work just fine. Since there evga gpu's you wont have to worry about a bunch of cracked pcb's either!!🤣

There isn’t a single mount that will hook 4 of those up. You can get a dual mount: https://www.officesupply.com/technology/computer-accessories/monitor-machine-stands/monitor-stands-risers/peerless-freestanding-desktop-stand-ultra-wide-curved-monitors/p1118411.html?ref=pla&utm_source=google&utm_medium=cpc&adpos=&scid=scplp1118411&sc_intid=1118411&gclid=CjwKCAjwsvujBhAXEiwA_UXnAObvV5kqDsPoykwA3841xQ7HSzkdzf0cgS8tScYXX-noNOFF3b99lxoC1OcQAvD_BwE
 
If wall mounting is an option, you could do that as well with 4 separate mounts. 

You have to get another gpu most likely to run the other two monitors, every gpu maxes out at 7680 x 4320 so as long as you stay under that you wont have a issue. Monitor mount i doubt they make for 4 in 1 of that size, if they do its probably crazy expensive and very few made. Maybe even only a custom mount.

If there is no leak, I think it is just air which was in the radiator. You can try to get rid of it by moving your PC a little bit. As long as no liquid runs out, you should be ok

That's normal after filling your loop for the first time. All that air takes a bit to work itself out of the nooks and crannies and back into your reservoir. 

Also keep in mind, that you dont want your reservoir complely full. Keep at least a few cm of air in there so the water can expand if it gets warmer

I'll bite, let see how my 3960x is holding up