It matters not what you do, there is always someway to improve upon it. All the negative points have been hammered on already. The fit of the timber tot he components is excellent. Your finish looks like CA. Whatever it is, you did a very good job of getting it on, slick and shine is very good. I have never been a big fan of mahogany for pens, the grain is just too plain. However, your pairing it with the beautiful light maple gives such a good contrast that they both look very good together. Your photos are pretty good. I think I detect a slight out of focus near the bottom third of the pen. It may just be me, my glasses are a bit dirty coming in from the shop.
Sorry to say it, but you are out of control. You are hooked. Your addiction is full blown and you will make many beautiful pens. Keep up the good work.
Charles