I am disappointed that I have to debur, but I am thrilled with the ease and speed over using my other trimmer. I don't see how a drill press would help consistency. Most of my brass is + or - 2 thousandths, so maybe something is off with your cutter. I did see that the angle inside the guide may not be exactly the same as my brass. I wonder if the plastic will wear a couple thousandths until it matches the brass better. My brass had a slight ring on the neck that wasn't even. I haven't checked that ring lately, but I have run a bunch of brass through it.
I may try to post up a video of my trimmer, later.
He who dies with the most tools/toys wins