I find the primer feeding is mostly fine on the Loadmaster [edit:]
as long as I keep at least 20 primers in the chute. The Pro 1000 I have the most primer issues with as the screw that sets the tension on the shell detector also holds it in place. Set it too tight, no primers feed. Set it too loose, and it will eventually back its way out. I've been unable to find any setting between too tight and too loose.
Tim, if anyone can do it, it's you. No worries, I just wanted to pass on my thoughts. I know that I learned a lot by starting out with a single-stage.
Oh, and if you do happen to make some upgrades, can you make two copies of each piece?