My son and I just finished this as a concept build- sort of a hybrid between the the Mad Hatter Tea Party and Batman Ace Chemicals.
PC 1- mini itx gigabyte AB350n board with 2200g and Wraith prism cooler, EVGA 1060 3g- mainly for file serving and streaming. 16g of corsair vengenance. Runs of a separate Silverstone 550w PSU
PC 2- atx- gigabyte aorus x470 gaming 5 with ryzen 2700x, gig 1080 water cooled GPU, custom loop with EK fittings, uv decals- main gaming/productivity rig
We decided to use all fittings rather than bend this time to go for a certain look. Its not perfect with some slightly 'off' angles around the pump. Cable management bit of a nightmare (see pics) mainly because of lighting/fan hubs for 2 systems but got there in the end. Use an LED strip in the back compartment to help when working there.
Decals are basically cuttings from an old black light poster- 3 UV strips in various spots to get the effects.
Seems to run well- CPU max at 60 C in Aida 64, CPU maxes at 32 in Heaven benchmark. Waiting to see what AMD comes up with re GPUs in 2019 will stick with the 1080 for now.
Sorry the parts list is a bit of a mess- i didn’t know how to choose 2 CPUs, 2 MOBOs etc so I added the bits for the second system into miscellaneous parts to try and reflect the approx true cost