Well, after spending like $200 alone on just EKWB STC fittings, I didn't want to spend more money on experimental pump/res hoping it will fit my build. I really love the look of the Iceman Cooler external pump/res but man at $100 for just a res and having to wait a couple weeks from China was a deal breaker for me especially when I bought my R160C Pump + Res for like $60 from eBay (auction). I was going to temporarily mount my Phanteks R160C until I examined my case closer and found out that I can actually remove the rear metal piece protruding from the my case and use that space to mount my R160C pump/res. I designed a mount for my Great Value Iceman Cooler pump/res. I spent an entire day to get the holes alignment correct and it utilizes existing holes (no drilling) and existing screws (no additional screws required). It's super sturdy and I - kind of like it. It may actually stay permanently.
If anyone cares for this very niche specific mod, I'll post it up on my Thingiverse.
Bonus points if anyone can figure out what kind of DDC pump it is, I bought it used on eBay and it works but can't figure which version of DDC it is. Pump is made by Koolance and just says DDC-3 Koolance. My limited research has lead to me thinking it's a
Koolance PMP-400 Pump based on the cable (3 pin? Non-PWM?) which apparently is an equivalent of a DDC 3.25?