There is no-one here from Eaton on the boards now, they will prob just refer you to the new Menvier series
which are just ion-clones with a few fancy features (and the only 300 zone model)
Plug on's have caused me hassle in the past. Suspect that a bit closer to the time you might have got a later pcb
out of them, all my common platform stuff has the PCB marked up for plug-ons with standard terminals fitted instead at
the factory.