Anyone have any experience with the Everglades 230DC walk-thru? Performance specs say 3.24 mpg with a 300HP. How accurate is that on speed and mpg would one question. Wonder if a 4 mpg would be possible with a 250HP. And a full curtain set? I don't see one listed but using it for fishing or cooler, rainy, rough water days, be nice to have a full curtain set. There's no frame at the top of the windshield so I'd wonder how Everglades or custom canvas shop could rig a weather curtain set?