I've been modifying the source as I've been moving between parts to tweak things.  There was the distinct possibility I introduced incompatible elements in doing this.  Since I had a couple new parts to print anyway, I decided to reprint everything and finalize some things I've been meaning to do.

• The end effector changes already happened a few days ago, and that moved the leveling to the side and added the ribbon cable run.
• The pick and place head got some reinforcement around the groove mount.  I found that if I tightened the groove mount down hard, I could distort the body to the point that the spring on the nozzle would get bound up and not slide.  Fixed. I also increased the possible mounting range for the rotation servo mount, and fine tuned the Pi camera mount to self center better.
• The push rod end now has a ribbon cable slot also, the servo plugs will now actually fit through the other holes without melting it first, and I tweaked the math so I can scale it a lot better.  There was an anomaly while printing the hinge area.   I was watching, so I saved the print by turning down the temp a little and slowing things down.  It is now a little grungy from having to sand down the mess in that area, but its strong and will work so I'm keeping it..
• The mirror arm had the light ring mount moved out a little further to clear my '180 degrees from where I planned for it' end effector, some new channels for nicer wiring added, and some additional stiffening added where the servo drives it.
• The part light ring got lighter, and I tweaked the mounting tabs to better center the light.  Well that's confusing...
• The main light ring needed to be reworked.  I have been running the main light much more than would be used normally... like on for hours at a time, while working on this.  The PLA version was not up to that task and got squishy

So... the main light ring base is now ABS, and the main light ring diffuser is now mixed material.  I didn't have any black nylon, so I just mixed in 30% black ABS into my translucent nylon.  Worked.  Angel hair stringies while printing.  Kinda neat.

The rest of the new parts.

Now to rebuild it all.