What are common leak areas for FX Dreamline?

Interested as well. I’m picking up a streamline. I just read somewhere that the dreamlines are pretty bad with poppets as well. A guy (sounded like a dealer or salesman) said every other dreamline that went out had a leaky poppet. I really hope that is an exaggeration but how do you determine for sure the leak is out the barrel? I do agree the fill port area is probably number one on any airgun.