RE: DL-50 engine
If that Edge is designed like the other modern laser cut super light 2mm ply built planes (ala Extreme Flight) it might be sub 12 lbs with a light glow OS 160. Might even be fun. Start teetering around 13+ lbs with the 1140 squares it has and it will fly like a scale warbird. 80 inch class planes like the H9 Cap is about the smallest the DL should power and still have good wing loading. I hope I am wrong.
Oh, my friend has a Cermark Pitts with a Super tigre 3000 in it and it must weigh like 17 lbs. It can barely get out of its own way. I think its an older version, 5+ years old.