Took apart center section. Riveted the stiffeners and cover brackets to it.
Assembled the control stick to the rear center section web. Used Phil's Waterproof Bicycle Grease on the bushings and spherical bearings in the control column mounts. Made final torques to the control column mount to WD-610 horizontal control column AN3 bolts, and to the AN4 bolts with castellated nuts. Took a lot of fiddling to get smooth operation. Removed the control column assy as a unit, mounts and all. Hopefully, it will be just as friction-free when it's mounted again.
Prepared the pieces (mostly match drilling) for F-706, 707, 708, 710 bulkhds. Made the F-710B angle.