Popped into one of the local Walmart Supercenters a few days ago, as usual went by electronics 'just because' and on the "close-outs table" find 4 NST's (BNVR300) and 2 NST-Glowlights (BNVR350). both 350's and three of the 300's were in the original shrinkwrap. Took the 3 unopened NST's ($30 ea), put them all to charge when I got home. All showed B&N welcome screen (no 'bricks'). So, if you're still in the market for NST's to run Practiscore, and are willing to gamble $30+-, check your Walmart.
short version: all 3 units now running Practiscore 1.2.18
long version: finished the install on the first unit, had an "oh sh**" moment when the PS splash screen said 1.2.7.
Went back and looked thru the rootnscoreit.com website. There are two pages that include "Download the Root'n-Score-It file (latest is located here)". On the main page (http://www.rootnscoreit.com/) the link does point to 1.2.18. On the 'Create microSD card/Windows' page (http://www.rootnscoreit.com/msdc_windows.html) the link still points to 1.2.7.
A little knowledge is a dangerous thing. Having read the site previously, and being in a hurry, guess which page I started on...... yep, the one for creating the microSD install card....
ATTN: J.C. Wren, you might want to fix that link....
downloaded the correct file, re-imaged the card, started over again, success.