don't have a hamer poll. Look for another style, or have a custom one made.
A good and simple axe is something that the average blacksmith can manufacture with little difficulty, so I'd suggest hooking up with a smith on this one. You don't need to go to a pricey custom maker (I reiterate this many times) to obtain a good working axehead.
I had a guy make me one, and he even added some embellisments for me. I wanted him to follow the Mammen Axe in style, and he did pretty good. hammer back is handy.
Pommel--in an axe, this is unnecessary, and actually a bit counter-productive. It is the massy, weight-forward feel of the axe that makes it good at chopping. If it balanced any more neutrally, the work would require more strength on the part of the user. Try this experiment--get an axe, then go to ha hardwar stor and look for the biggest hex nut you can find. Duct tape it onto the end of the haft, opposite the blade end. Now try swinginng it. Sure, it feels more weight neutral now. Now, go to your chopping target, and give it a few swipes. Okay, now undo the tape and remove the pommel. Now strike a few blows. See how the blows made without the pommel cut deeper?
Another option would be to investigate axes with smaller, lighter heads, and longer hafts to counterbalance the head.
I have a viking bearded axe that has a 26-inch haft. If I want to deliver a powerful cut, I hold it far down on the haft, near the end of it. If I want a more neutral "alive fighting axe" balance feel, I choke up on the haft so that my hand is 8-10 inches form the end of the haft. This brings the balance more to the neutral, but it does sacrifice some cutting power. On a soft target, it is still dangerous.
So, to sum up--don't put the pommel on, just 1)change grip positions to change the balance, or 2)investigate lighter headed axes. I recommend ragweed forge. Check out the Franciscas--they're fighter/thrower/belt axes from the Germanic tribe called the Franks, ancient ancestors to the French. They're compact, throw well, and make a useful and compact cutting/hooking tool.
There is also an advanced reverse grip for an axe, but no need to go there now (it is mostly used for fighting with axe, not in a tool application).
Keith
Keith