Alot of info there vintagekiki.. ok thanks for those.
I bought another roach.. & indeed this has worked/ stronger trem & volume drop is slight: huge improvement. I had thought I put a new one in when I rebuilt this twin reverb, but obviously put the old'un back in.
I do get some motorboating ticks now tho, but only apparant when not playing.
Thanks all- & a happy new year.