They improved the transfer bar design before I bought mine. Actually my prerequisite for buying one was making the die plates available without powder measures....that was dumb and expensive and unnecessary, and I told them so. They were concerned about the spacing between stations and some bozo convinced them that the P.M. included was necessary (maybe a Dillon inspiration) because changing them was less than handy from die plate to die plate. I told them that was nuts. All they needed to do was supply powder dies separately like Hornady does. (The engineer I was talking to said, "Oh") So then when they started selling powder dies separately I bought one.
And yes they index smooth as glass.
So have I broke a transfer bar in over 2 years? Nope. Can you break one? Yep. Easy.....just force stroke when something doesn't feel right...there's a lot of torque available with little effort.....but then you break something on any press when you do that. I learned a long time ago, that if it isn't smooth (and the ProChucker is smoother than most...even Dillons) stop.....and find out what you did or didn't so to make it suddenly not smooth, even a spongy feel is a warning. Don't
ever force it. Then nothing ever breaks.
The most common source of grief would be not keeping moving parts clean and lubed. Advice good for any brand's press. Test for that before a loading session ..... especially the case feeder.....and primer feeder and there are no problems. That said, I don't prime every time on press because by the time my rifle cases reach the press they are usually sized/deprimed, tumbled, trimmed, chamfered, deburred, LC is swaged......just how I prefer to so things.....but when I do, I make sure it is clean and lubed.
If the PC7 has a weak spot it's the accessory case feeder. As it comes, it isn't perfect..... but it's easily and cheaply fixed to perfection!
With thumb screws and a 25 cent 3d print. Prettier too....