Paul I am gonna be picky because your work is so good, that is a superberly turned and finished pen but the clip button looks awful.
That is not your fault, it's the kit.
Can I suggest you lose it in the top of the pen That would be great for me thanks.
Paul, yet another cracker mate.. Agree with Grumps on this one.
Why not try turning up your own clip button out of wood...
Try enlarging the top hole and sinking the button inside to lower it somewhat.
I think that would suit the style you are creating.
You may have to strengthen it with some ca and cut a small recess for the clip.
I know you will be successful and have a great looking and unique to you pen.
Waiting with baited breath trend setter.
Or try cutting your original bit of pen blank the length of the tube + the length of the top button turn it then cut it at an angled recess down to the tube for the clip then the top button will be buried trust me it looks good especially if the top bit of wood is a contrasting colour