Very nice. I like both of them but really like the grain pattern in the rosewood.
A closed end pen is very easy to make. All you need is a closed end mandrel and to be sure to drill to the correct depth for the cartridge. The rest is gravy.
I'm learning though that closed ended rollerballs are super difficult to sell. Everyone attempts to post the cap. Now fountain pen users rarely want to post the cap because it destroys the balance of the pen.
I must say though that single and double closed ended pens are my favorite. Keep making them and try a closed end cap with a hidden clip next! That's what I'm going to attempt now that I own a drill press.
i turn these down betwwen centres using the chuck to hold the top bushing,
and then finish them on my barrell trimmer, only the cap is turned on my mandral.