Well, the drive works stable since Sunday. But I will inform you immediately as soon as my wife cries “FIRE!!!” 
And I wonder if it is possible to use a floppy cable like this: https://www.amazon.co.uk/Cable-Tex-Molex-Floppy-Drive-Power/dp/B005L0XX7G
Maybe with a little carving 
2 antenna! I found only one connector for antenna not 2!
You can use a separate wifi-pcie-card (like i do) then you need 2 antennas 
We are looking for a large quantity. Where can we buy a sample?.
Regards Prakash
Hello Sinovoip,
2 questions :
1 - battery location ?
2- Where buy on aliexpress ? ( https://fr.aliexpress.com/store/group/R2/701314_503460297.html?spm=a2g0w.12010608.0.0.6b1db6b5OlOmFF )
you mean hole for battery connector? It’s not working on bpi-r2 
Is there a way to add a 2,5" sata drive to acryl case?
just Premium Aluminum Enclosure support sata hardisk inside now , but acryl case not support now ,but easy to do it .
Premium aluminium case - the problem hard disc is laying directly on metal - in my case this was probably the reason I lost two HDD’s
(they were working on other PC’s and after moving them to BPi both were crashed withing few days)
Is there anything to put between HDD and metal case?
I’d bet that more probable reason for crash are thermal conditions inside these cases. When I started to use mine I almost immediately noticed that both HDDs I’ve had installed in the case show idle temperatures in 45-50C range. It made me worried and I ended up drilling vent holes on the one side of the plastic cover (same side where SD card slot cutout is) and attaching 12V 35x35mm fan (like this: https://aliexpress.ru/item/32819488010.html) to the other side. It was too loud for my taste when running fan at full 12V but soldering a 0.5W resistor with aprop. nominal (don’t recall what exactly it was) lowered fan speed to an adequate level from the noise PoV and at the same time idle temperatures for HDDs went down to 30-35C (ambient room temp is ~25C).
TLDR: Make sure you’ve got adequate cooling for the insides of the case. HDD would say thanks to you.
It’s up to you what to place there if anything. I use a cutout sheet of 250gr/mm^2 paper and put additional red colored washers under HDDs one for each screw. This kind of washers usually comes with PC cases, don’t know what material they are made from, I’d guess it’s hard pressed paper.
Thank you. I will do the same.