Thanks Ray, I enjoy the challenge of this sort of gear, it is so beautifully engineered and somehow needs to be respected. I hope I can get it to autotune one day soon. One of the challenges when aligning the gears and shafts was the limited space to loosen and adjust and re-tighten the bristol spline grub screws , they would often try to seat back into a previous mark in the shaft and that position might not have been correct . Collins solved this problem in later equipment by using circumferential clamps and fingered bosses on the gears, so no grub screw marking on the shafts. Just a small detail but that makes a huge difference when you have to align a multi-function assembly.