Well, it works sans drive letter issues and super quick too.
However, there are a few caveats... setup is pissy about port location and may thus inexplicably whinge about "a required CD/DVD device driver" despite no such device existing. Likewise, one must be careful where the bootmgr ends up (and be able correct it). And finally, even though pre-formatted/bootable/active, it may report a drive as offline however does allow switching online.
So, in the end, it could be more time consuming if unfamiliar with such things than using a slower USB flash drive. Presumably, using a HDD/SSD via USB 3 would be the best combo of speed and minimizing complications.
I may try that sometime just for giggles. :awe: