@Michal I'm sure a number of people, including me, want to see the details of how you put together your mic cable.
No hot climate in the UK where I do my hiking and camping unfortunately so no chance of it overheating Not really noticed any issues with lower quality with the case on TBH. Nothing that would deter me from using it anyway but I can test it out now you've pointed it out. It wasn't an issue before I read your post anyway