Twyst's Rivetable Plate

This one turned out super clean.

But having trouble with a 2 x 7 plate I'm trying to etch for a secret project. I've tried four times with pnp blue and pretty much a failure each time. The right side lays down very clean but the left side is ugly. It must be that the iron is too hot and left side temperature is too high by the time I get to pressing down on it. Going to turn the iron down and give that a try.