[Steve Hamilton]

Welcome Bart
Use the search tab try shrink dies, thumbnail dies, etc. you should find a lot of good info.

Any pictures of your hammer?

One of the areas of concern with the dies is the contact area on the front (closest to operator) side right in front of the thumb. It should be a smile shape that matches up on both dies. That is the only part that should make tight contact. All other areas should have a small clearance. Lots of smooth relief around the edges, so they don't scare up th panel.

Steve