Thanks for confirming :-)

It makes the left spinner unbalanced because shooting the ball up the left spinner lane makes it score 1000 points per revolution since the rollover buttons in that lane spot both 400 point scores on that spinner.

There's two ways to fix it:
You could make hardware changes to those switches/lamps (i.e. swapping the wiring to the yellow and orange lamps plus swap the switch return wiring to the "2" and "5" switches). This will mean the manual/schematics won't match the machine.

Alternatively I have made a ROM mod. Do you have access to an EPROM programmer?
There is very limited free space in the ROM, but I might also be able to add freeplay, or how about open-ended special on the 1-5 upper lanes? (right now you can only get one per ball)
Or if there's some other mod that's more critical, let me know.