redxps,

I ordered that same DeepCool 240mm setup, but I could not get any of the mounting screws to work correctly. The only other thing I could think of was I might have needed to take the entire motherboard out and use the Intel bracket it had. From the pictures and the limited information he had on that particular post it didn't say he had to do any of that when installing.

I have seen an R14 with the Arctic Liquid Freezer II 240mm AOI installed, but I am unable to locate that information at this moment.

 thanks for trying to find it, though; I'm curious if I should go ahead and try to install the Arctic Liquid Freezer and try it myself. I tried the Deepcool one, but none of the mounting screws would fit within the Alienware motherboard, so I had to put the old non-cryo liquid 120 back in. 

Actually Dell was sloppy enough to design R14 heatsink mounting hole spacing to be the same as R13, as 13/14 were released simultaneously. Dell part list shows R14/13 share same liquid cooler Dell 80H81 (non-cryotech). So R14 is c/w lga1700 cooler that works with Dell M3 backplate.  The Z height of AM4 is different from LGA1700, but Dell was nonchalant about this and just stack an intel cooler on amd cpu.

Do you know of anyone else installing a 240 AIO within an R14? I've seen one with the Intel version, but the DeepCool AIO didn't work with any of the installation hardware given. 

You mean this one on Reddit. If that was done smoothly you should have no trouble replicating it in R14. 13/14 have very similar chassis hardware, the only major difference being motherboard and cpu.  NB: R13 motherboard has no attached backplate suggesting heatsink is directly mounted on chassis studs, whereas R14 board has an attached backplate on the other side.

I just watched LS520 install video.  I understand better now. Both R13, R14 install pose some challenge due to either Dell threaded stud on chassis floor or backplate glued to motherboard back side. So the AIO backplate with screws cannot be used obviously. But you can install your own M3 screw (double end) on Dell backplate, put the AIO stand-off (little cylinder spacer) on the screw then mount the liquid pump.  Use the AIO nut to fasten the pump on the M3 screw stud. I think the LS520 nut will probably work with the M3 screw.

AIO stand-off

AIO backplate, toss it.

Here is a reddit link to an R13 Arctic Liquid Freezer II install 

Ok, that is some good information to have redxps! Appreciate the support, I guess now its off to find an AIO cooler that has M3 screw support, which I'm assuming won't be possible.