The power amps have now been connected to the output transistors. Any aluminium electrolytic capacitors you can see are for de-coupling only, none are used as part of the signal path.
Wiring up has proved very time consuming. It is far more difficult to air-wire than to use a PCB. I am concerned that this will prove a problem in trying to keep the purchase cost down.
I do have to air-wire, I will not use a PCB no matter how long it takes; they just don’t do anything good to the signal. On the other hand, the amount of time it takes will decrease with practise and I can use mass production type techniques to help here too.