Thanks again guys, to follow up on the story here are some post hunt processing pics.
Gotta plug a couple local business, if I may. First, I needed some food grade silicone spray to lube up the grinder screw, etc. but couldn't locate any in the local area. So I called Western Meat Co. to ask where they buy from or if they knew where I could get some grinder lube. They told me they use food grade mineral oil and that I could stop by and get some. The stuff is dirt cheap but it was a nice gesture and they gave me enough to last a long time. Then I called Top Foods (Haggen's) in West Olympia and asked if they would sell me some fresh, clean fat trimmings from their beef cuts from the morning's cutting. They said sure and to come by around noon. When I showed up they handed me a pile of cleanly packaged fat trimming to add to my burger, no charge. Again, no big deal but a nice gesture.
I have used pork fat but lately I prefer beef so I can cook it rare and keep it juicy!