Hi Gary.
That's a nice piece and once finished it will look even better. Good job!
However, being it cilindrical the finial looks a bit out place, not because its shape, that is great, but because its length, I believe that if it had been at least half of it it will look more integrated with the box. Now it looks as not belonging to the box.
Obviously this is only my opinion and you should take as such, after all it is your piece and your design.