Aileron and flap servos installed. Adding bottom sheeting to center section. Using an old manila folder, made a template of the wheel which I then mount to landing gear. I trace the template and rough cut/drum sand to template line. Then I mount the wheel and use sand paper on it's outer diameter, rotating the wheel/sandpaper against the balsa sheet. As I do this, I press the landing gear left, right - the widens the opening as the landing gear has a bit of play in its assembly. When done, I have a nice smooth, round opening that lets the wheel retract within its max left/right tolerances.
I'm leaving the bottom section of the wing, above the belly pan, unsheeted. By leaving this open, have option for locating receiver, smoke pump, smoke oil tank, there.
XionRC wing locks never arrived. See that their website and email address are dead - contacting RedwingRC as it looks like they've taken over XionRC's product line.