LA-2A opto cells switching

[beatnik]

I am designing an LA-2A PCB with two switchable T4B opto cells, to select between a fast and a slower version.
I have attached a schematic of what I've come up with so far along with an original LA-2A schematic for reference.

Basically I am using a pair of DPDT relays to make the switching.
One pole is switching the 0V reference for both the audio LDR and the EL panel in the input section of the T4B. The other three poles are switching the metering section.

I am positive this should work well but a second opinion would be certainly welcome.

 

[rock soderstrom]

I am positive this should work well but a second opinion would be certainly welcome.

Interesting project! I would probably switch the sidechain connection too.

 

[beatnik]

I'm trying to avoid a third relay, cause I'm really short of space on the PCB.

The sidechain signal is always connected to both EL panels but switching the 0V reference should be keeping only one EL panel on at a time, this also saves consumption on the EL panel that is not used (they tend to degrade with use)