I have just swapped-out the blue led's 330 Ohm current-limiting resistor for a 3k3, doing that seems to have done the trick with regards to taming the brightness so I'm happy with it now.
Here's a pic of the modded Super Twin footswitch pedal, with all three indicator leds working:
If the EQ is switched-on, the green led lights.
If the Volume Boost is switched-on, the blue led lights.
If the Distortion is switched-on, the red led lights.
You can switch on or off any combination of the three functions.
Last edited by DrNomis_44; 07-06-2020 at 10:09 AM.