You are awesome thank you very much. I am done with that shitty adapter. No need to take off APU shield it will be nice...
In my subjective view.
This adapter having less risk, but more complicated to works on.
The most problem is the adapter bending when got heated.
Thats why i revised using meshed ground rather solid one.
I use the thinnest pcb in hope that the aluminium case of the emmc could be closed.
Turns out the the height slightly bigger, so it could be closed, but the lock doesn't quite work.
If you just let the emmc open without the case, then i think you might choose the thickest one (with the same price),
to avoid bending the adapter when reball it.
The experience of reball this adapter is quite different.
The 're-alignment' which usually happened when the tin melted, doesn't happened in here.
Thats why i revised the pcb shape to be fitted with the emmc, so i could get a 'gist' the correct position.
This is the most difficulties actually.
I check the connection by checking the VDD pad and CMD pad continuity with its corresponding point on the main board, before put the battery on, to make sure the pin correctly connected.