i just thought id let everyone know about this working combination of drive adapter and msata ssd that works mint in my wallstreet. i had to wait almost a month for the adapter but for the price i didnt mind.
i figured i wouldnt need more than 24gb for os8.6 it was recognized as soon as i booted with an os9 cd to partition and format. the adatper and msata is about half the size of a 2.5" ide drive, i secured it from moving around with velcro inside the original caddy.
the biggest reason im posting this is because i know that these laptop IDE drives are getting old (and slow!), and the book itself can be picky about replacements. this cut the boot time down by over half too.
hope you all find this useful! im sure it would work in other 'books too!