“Unitil I consulted your provided photos of your set , I was initially going into the mind set of a transverse traveling /latching bar and its locking feature, such that only one pushbutton is active at one time, and it comes unlatched as another is pressed to be engaged.”

As you look at my last photo, the four switches on the left side are active at one time and become unlatched as another is engaged. The four switches on the right of the photo work independently. It is those switches that I think work as you explained. However, it’s the left side switches that are the problem.

I can only access the switches in the position you see in the photo since the card they are mounted on I think is soldered in. I did clean the switches with a spray cleaner called Miller-Stephenson (MS-230) Contact Re-Nu that contains no lubricant. Because of the switches location, it is difficult to examine them closely. So, I can clean (or spray) and assume I am doing some good.

Anyway, with clarifying the type of switch I do have, do you have any other comments?

Thanks,
Jerry