I feel your pain, but I did visually inspect (whilst mounted in case) my card and it seems the thermal pads between RAM and mid plate were making great contact.
I also bought a thermal probe with a display and for the last few days I had it tucked under the V (top left) of EVGA on the back plate and ran Heaven DX11 for 30 mins and ran Battlefront (SW) at max settings @8k getting around 15-21 FPS (so cinimatic) for around 30 minutes.
The probe never read above 63°C and the GPU was around 67°C with my own custom fan profile which is quite agressive and peaked at around 2090RPM. So you could buy a probe and visually inspect for the RAM issues it may help put your mind at ease. The probe was £5 in the UK. I've since bought another one and a front plate for the 3.5" bay so I can permenatly mount them there.
When I get the second one I'm going to do further testing and post here on 2 different spots of the backplate with the probes secured by a small thermal pad I bought from Ebay.