I did take some pictures before removing the old crt, see below for how the purity was adjusted. As for the installation I have the yoke, then the red/green/blue convergence assembly, and then the the blue lateral and purity control which is one part. Am I missing or forgot something?
I have been trying to both center the screen and get color purity by adjusting the purity magnets and sliding the yoke forward and back. Note sliding blue lateral and purity control forward and back provide some very minor effect.
