This is my first ever custom water loop build, so ofc I built it in my first ever own designed chassi as well. This might have been a bad idea, but a lot of grey hairs later it stands tall. I have modelled it up in Fusion 360 did some misc parts as zip tie point for the top rad, new trim for the CPU block and pump cover.

It's printed in 8 main parts, mostly to be able to print it on my Prusa mini+. Each tower is kept together with four M3 threaded rods but the towers are only connected by the components themselves, so MB, GPU and rads keeps the two towers connected.

I used 16 mm tubes which in hindsight was probably a bad move, should have gone with smaller tubes, so I could have done finer bends. I don't use a reservoir, the top rad feeds the pump directly which works perfectly fine since the rads have ports top, side and bottom! so I have a drain port installed on the bottom rad. The loop fills fairly easy since it can fill from the pump side and backfill through the rad down to the CPU and GPU which makes it really easy to remove all air from the system.

My phone camera isn't that good so please ignore the somewhat bad picture quality.