RE: OK for second plane?
I like the Knockabout's color selection. In choosing it as a second plane: it's probably as good as any Four-Star or Tiger 2. With a low wing, semi-symmetrical airfoil, little or no dihedral, squarish fuselage, and standard control surfaces, and weight that's within reason, they will have similar flight characteristics and stall tendencies. In fact, the Knockabout would probably be a better choice than the Four-Star because of the tricycle gear.
NorfolkSouthern