Well, I'm glad to hear you're honing that edge a little more, a desk-bound letter opener can never be too sharp; Although I don't need to tell you that I'm sure. One never knows when one must deploy said letter opener on a letter that requires a keener edge.
Nice little unit here K, me likey a lot.
I've had a Japanese short sword also known as Wakizashi on my want list for quite a while. They have a longer blade, 12-24 inches (30-60cm). When I saw this, I thought it would make a nice companion one day. Plus I just liked it's looks. A well-made Wakizashi is much more expensive. Maybe next year for my Bday.