If you leave the end of the head (the part that you strike the ball with) as a tube cross section, you introduce quite a few unneeded glancing angles that make the strike less predictable - if you really want to get your professional bike polo ass on this (and become some kind of Brick Lane sex hero) it might help to cap these two open ends to give you a single flat (although I recommend a slight convex) striking surface on each end.
Although you might not really give a shit, in which case carry on.
If you leave the end of the head (the part that you strike the ball with) as a tube cross section, you introduce quite a few unneeded glancing angles that make the strike less predictable - if you really want to get your professional bike polo ass on this (and become some kind of Brick Lane sex hero) it might help to cap these two open ends to give you a single flat (although I recommend a slight convex) striking surface on each end.
Although you might not really give a shit, in which case carry on.
Nice job by the way.