UGGGGGGGHHHHH!
Landing gear on a Wonder is like... well, it's awful!
I build mine with the fuselage pod glued to the wing, with an access panel in the belly.
A hardwood strip on the belly for abrasion resistance on the concrete runway.
Full power on launch, and away it goes!
And rudders.. it is to laugh! The moment arm is too short for rudders to do much of anything. At slow speeds they enhance the snapping manuvers, but they're just a waste of weight otherwise.
It will raise your adrenalin level nicely!