I've been looking at this and I do like it a lot, but I think if you made the body thicker to better match the cap it might be disproportionate where the body meets the lower section. Maybe a thinner base on the cap?
I've only done three kitless but understand the difficulty in making them. I think you did a good job. It looks like you did a great job on cutting the clip slot on the cap. I am happy to see more efforts at incorporating wood into these type pens, good combination choices on this pen.