I never liked ether one of those. Sooner or latter you will double clutch the handle when you get a primer hang up or a case not entering a die just right. Every time you move the handle it acting upon the powder drop.
You can work around it. But its a serious pain in the butt.
Case activated linkage and a powder check die is the only way to go.
That's exactly what I tried to tell the O.P. in post 2. RCBS dumped that drop system for a reason.....and it's not that expensive to change it.