[Elecraft] K1 Noise Blanker version diffs?

[Mike Geddes]

I am the proud builder/owner/operator of K1/4 #2319. Had it fired up and on the air this past weekend.  Great little rig.  I was building the K1NB board tonight, and noticed the manual has directions for Rev C and Rev D.  The instructions for Rev C include installing a cap in a mis-named location (there are 2 C6's on the board), omitting a C8, and other differences vs. Rev D.  My questions are these:

1. Since my K1 and accessories (including K1NB) are a recent purchase, should I not have received the "latest" rev, which appears to be D?

2. In my experience, later revisions are based on experiences with earlier versions, and are thus improved. Is Rev D a better design / performer than Rev C?

3. If there is a Rev D, why do they even ship Rev C versions?  To get rid of old stock?

For a recent purchase, it just seems a little odd to be building an older version of the board than the latest available.  Kind of like buying an older version of a software program when a newer is already released.

Any insight or answers to the above questions?

Thanks and 73,

James
N4JX