The brass cap improves the appearance mostly, in my opinion. If your tamper catches fire, you are really using it wrong. Harder woods work better if you don't have a cap. Technically basswood is in the hardwood category, but it is fairly soft. But carvers love basswood, since it is so easy to work with. Feel free to jump on it. We have all skill levels, types of carvers / turners and lots of different materials. As long as you post a picture of your tamper before I get home from work next monday night, when the trade ends.
Winton.