So i am going to hack a micro SD card adaptor to low profile, since I have a one lying around with a broken lock (I can't write to my micro sd card with this adapter because of the lock is broken). Warning: this process is irreversible, the modified micro sd card adaptor cannot be returned to its original form. proceed at own cost.
recipe for success: nimble fingers, lots of patience and a stroke of luck.
Carefully fold the pins on the RHS to contact the micro SD card.
Secure both the SD card connectors and micro SD card connectors as necessary.
Conclusion: This hack requires a lot of carefull bending of pins. Theoretically, this hack should work; but it doesn't work on me. I guess I have to secure the microsd to the adaptor one way or the other.
update: i try another method of folding the pins and also slipping a tiny piece of paper to ensure the contacts are properly connected. it worked intermittenly, pi crumbling at the slightest touch.
For convenience sake, I am buying one of these at 2quid inclusive of shipping. Modify the usb part would yield a long term and stable solution.