Good People of Internet,
This is to let you know that
Goodram SSDPR-CX400-128-G2 fits the slot, after some minor adjustments. Of course you need to remove it from the plastic cover (start from the opposite side of where the SATA port is and use the exactly needed amount of force
. My advice is to use isolation tape to protect the drive especially from the bottom as it touches the SMT elements. Also, do not use too much force on the screws of the front panel so you won't break the drive PCB. Coincidentally it fits in a way that it neatly secures the drive. As with previous reports you need to cut a little bit the metal RAM cover, which is rather an easy task.
On the other side I wanted to report that the SATA to MSATA converter did not work for me. Not sure why. I have BIOS 1.0A and gave up updating it after unfair fight for hours with different versions of bin. If someone had similar situation and update of the BIOS helped I'd be grateful for letting me know.
take care