I will answer my own question. I just configured 8 MR3040 version 2.5 (as per what the label on the boxes say) LibraryBoxes without a problem. To my surprise, on the first one I forgot to move the switch from the 3g/4g position to the WISP position, and it still configured OK. I used a mixture of 3 different types of SanDisk flash drives ---Ultra Fit, Cruzer Blade, and Cruzer Glid-- all with the same results... WHOA, wait a minute! I just pulled the battery on each one to double check the version number and, despite the box saying they were all version 2.5, the label under the battery on all of them says version 2.4. I have no idea why the discrepancy.