So. This afternoon I lifted and tested all the switching diodes, checked all the electrolytics around the bandpass filter, and resoldered the rf input connection, and lamp pins.
I knew it was deaf, its like a different radio. Over the moon with the results
https://youtu.be/VTn6Y6Epu5A
(Id also bypassed the 0.5-1.5mhz attenuator, but its not that thats made the difference)