Quoted from HHaase:
I'm just not confident in the long term longevity with the reed switch design.
I've had the reed switches in my Disco Fever for almost 2 years now and they still are working fine.
As a manufacturing perspective I would consider making just single boards similar to what you have except with reed switches. See my latest post
I wouldn't even add the diodes. A person would just remove the wires and diodes from the old boards and install the new boards.