Ok, advice requested:
Option 1- replace all caps in supply, C21, C24, C22, C34, even if they seem ok.
Option 2- isolate supply, disconnecting cathodes of CR5, CR6 connecting to new caps, pull cathodes of VR2, CR4, emitter of Q6, pin2 of T3 and batteries to test supply and hopefully find a short in the load
Option3- keep cutting traces
Option 4- reconnect all, remove batteries, check current draw from batterirs or supply (avoiding battery charge current) , if still high, one by one check current of each supply. The +13 and +6 should be easy.
Other?
I guess I lean towards 2, but....?