The little LT-2600 pump proved to be as untrustworthy as its trashy pcb looked. It died as it lived - silently. I re-organized this build to a slightly more sensible 240 + 120 dual radiator build, with a Nuvolo pump/block combo. I like this build a lot better now - all the tubes fit inside the case (gasp), the new ddc pump seems way more reliable and powerful, and there is more airflow in general. Moving the fans above the radiator cut down on turbulence noise, but sadly neither the fans nor the radiator are actually screwed to the case in any way.
I also took the opportunity to upgrade to a pcie 4.0 riser from FormD, which fits perfectly and does boot - but crashes in game regularly if actually used in pcie-4.0 mode. Sad times, but the internet suggests its probably the fault of my B550i motherboard anyway, and I am not going to take this thing apart again if I can help it.
Lastly, I've added the Noctua NA-FC1 pwm controller for the DDC pump speed control - I keep it at about half speed which is fairly quiet. Both the new pump and the controller need SATA power. Luckily, I was able to hide most of the new cabling between the PSU and the front plate of the case.
The new 120 xspc slim radiator hides a 25mm arctic fan - exhaust. A handy pump-fill line is jammed from the pump top to what was previously the power-button. A 20x40mm Noctua fan keeps air flowing over the ddc pump housing.
Slight re-route of zmt tubing on the GPU side.
two mini fans pointed up to the Nuvolo pump.