So I have a S-PD and a P-PD and they have different tops. The S looks like a Vulcan top.. real flat then bevel 3/4" from the edge. The P has a slight dome then the rounded off nose. Kind of has a dip near the edge of the rim all the way around. I've seen other PD's like the P I have always thought it looked kind of messed up. So my question is which is the true PD? I can post pics later if needed. Thanks for any help.