Sorry for not answering your question, i don’t have the answer, and i am a newcomer there.
I didn’t order any case, my M5 is bare and i was wondering how much lack of cooling it can sustain; i really dislikes fans, those consume electricity and can be noisy, so i rather prefer not requiring too much cpu power. I read your post while searching about heatsink requirements, this was the first one for M5. I will continue searching… But i didn’t yet run enough my board to know if i can continue to play with it without any cooling, not even a heatsink, i am in first discovery.
I guess you took a decision about using copper or not since this post …
If you can give some feedback about your findings …
Why do the fans need a tape for? Wouldn’t it obstruct the airflow? I could be wrong but I thought the blue tape is to affix the heat sinks to the CPU etc.
Looking at picture, yes, i would use the blue tape to stick fan on the box internal upper side and the fan pointing down over the heatsink sticked on the cpu.
I bought heatsinks and they come with a sticker already.