I was looking at your finished product and had a brain storm with the knurled wheel you have on the passive wheel. I am thinking two pulleys on the other side and a belt with a spring tensioner. Hehe now I am getting the fever and my wife will not see me for awhile
Are you going to build your hopper yourself. That is the one thing I will not be able to do I think since I do not have a brake nor the knowledge on how to use one. Lucky me though I have a brother in law who makes duct work and has one.
You sir are not a hack but I am truly a hack. I have both a mill and a lathe and can turn out some fair parts but I think I would have well over 8 hours into the mill when I am done. And while it would be faster and easier to buy one I enjoy a little shop time myself