The new drill bits did a great job on my first test drill. This picture is right after the hole was drilled, with no dressing of the bar. There is a very slight burr around the edge. A quick pass with sandpaper will take care of that. I used a piece of scrap aluminum under the copper to prevent burrs on that side and it came out better than the top.
@JJJJ, if you're going to order copper bar online, give it plenty of lead time. My first order took almost four weeks.
@JJJJ, if you're going to order copper bar online, give it plenty of lead time. My first order took almost four weeks.