i've got 3 1000- had them since about 1990 or so when they first came out- 223, 9mm , and 45- first thing i did was bypass the case sensor- it's just a matter of keeping the tubes full-that way i get a primer whether there's a case there or not- just take it out with needlenose pliers if there's no case- never had a problem with the case slider either, although it's easily replaced for all of about 8 bucks- then i increased the cant to about 15 degrees forward from the vertical to help the primer feed work better when getting empty- you SHOULD reload when you get about 10 or so left in the tube, as reloading when you get the tray empty will still leave a couple of primers in the neck and these will jam the feed when you put the recharged tray back in- as for the chain, you should see the amount of chain you getfor a couple of bucks at tire- it's simple ball chain-and i've done 44 mag on the 1000 before i got my loadmaster- no problems at all- the ONLY reason i went to the loadmaster was because of the 4th hole for the factory crimp die