The auto feeding isn't that important when it takes about 6 seconds a case to anneal. 10 minutes for 100, you spend more time getting it setup. So keep it simple.
Mine is up and running, no feed just drop them on, cut my tin @ 25mm as I wanted to mainly do hornet type works perfectly on 17 Ackley's, 223's so tried some 25-06 and found they sometimes fell out of the drum so made a longer rest and worked ok. Might cut my fat daddyo tin a bit longer to do some 7mm RM.
Ol 55
It kind of got a bit complicated but it works beautifully. I've got shorter rollers to do 6BR and a different feed drum that will do 223 diameter cases as well. It's only 3 screws and about a minute to change it over. That drum on there does 308 and magnum sized cases, I ran some 260 and 6.5 saum cases through as a mix with no problems, it also did the couple of 300WM cases I had lying around.
From memory this has about 16 roller bearings, 3 timing gears, 4 moving arms and a cam and roller follower on the back, it's horribly complicated for what it does but it is cool and once it's all together works really well. having the rollers opened by a cam on the back of the feed drum means it has to be timed properly so can't under or overfeed cases, it has to do the same thing every time.