Hi,
Just reading your post. Will take some photos this weekend. It's simple really, just screw the die into your press as you would with a sizing die, place a resized, lubed case in the shellholder then raise the ram to the top. If your case is too long, it will stick out the top. Get your file and give it a couple of swipes till the extra is gone and the case mouth is level with the top of the die. That trims it down to the proper length. Then champher, debur and tumble. I use an RCBS power trim mate to do these functions. That's it!