[Elecraft] Updated sub-receiver KRX3A- or a typo?

[Bruce Beford]

While downloading updated manuals from the Elecraft site, I noticed two
different manuals for the K3 sub receiver:

KRX3  Manual (pdf)  (8 MB) KRX3 Sub Receiver Option Manual (Rev F1,
03/14/2013) - although the document itself has a date of 3/14/14.

KRX3A  Manual (pdf)  (7 MB) HIGH-PERFORMANCE SUB RECEIVER INSTALLATION AND
OPERATION (Rev G, 03/17/2015) - I see this one has an ECO suffix
(engineering change order?)

So... I have to ask- is there a new version of the KRX3, the KRX3A coming to
market? The K3 order page still shows only the KRX3, not a '3A version.

As I have had the original KRX3 since release, I am of course, curious.

Thanks,
Bruce N1RX
K3 s/n 559