Those wings are a very interesting take on scalloping. I like it.
As to weight, I'm flying a 53 ounce Fancherized Twister with an LA 46 in NBE (Near Bottom of Expert), and regularly getting over 500 points with it, and while I could do better with a better plane, it's not the plane's fault that I'm at the bottom of the Expert pile. 54 ounces with over 10% more wing area in a stiffer plane should work out fine.