Rear 120mm Radiator in Define 7 Nano

I am planning on running a 240mm radiator in the front with a 120mm radiator (EKWB Coolstream SE120) at the back inside the Fractal Design Define 7 Nano mITX case, but I'm running into clearance issues with the radiator in this position. I have a spare 240mm radiator I can mount at the top, but it cannot be mounted because it interferes with my 64gb GSkill Trident kit. I wanted to run 360mm (240 front, 120 back) of total radiator with the solid top to reduce fan noise, and so I have enough space for RAM with tall heat spreaders. Has anyone here experienced similar issues with the Define 7? I've built a system in the Nano S years ago; I was super excited to build in the case's successor, but now I may be stuck with only 240mm of radiator, when I'm trying to cool a Ryzen 7 5800X3D and an XFX Speedster Zero 6900XT. Should I get a different RAM kit and use my other SE240? Is the rear 120mm clearance issue fixable, or could I run only the front 240mm?