I have a friend who built a Slow Poke. He too thought that it was going to be good slow flyer. He says it sucks and hasn't flown it as long as I've known him. He says he'd take it to a swap meet to unload it except for one thing. He knows it would only be bought by someone without too much experience, and he doesn't want to screw a beginner.
Some models have less than aerodynamic design criteria. There is one "design" out there whose major purpose is possibly a joke. It's made of what is literally nothing more than construction site junk. It's fuselage is drain pipe downspout. Another one's fuselage is a piece of lawn furniture. They fly pretty much like junk. I've seen a number of them fly. That's about all they do. I've seen one hardheaded "believer" of the concept who brings his out time and time again. I've never seen him take the junk home in one piece. They've accomplished what was probably the only design criteria. They can take off before they crash. So "they fly".
The Slow Poke is a cute looking thing isn't it. It appears that was the design criteria. Maybe all of it. But then, I've never built one. So take my advice with that understanding.
At least I offer a guarantee.........
If you're not entirely satisfied, there will be no additional charge.