recently I received some preamp kits and successfully built a working A12 and T15.
However I didn't manage to get my N72 to work 
.The problem is that I got the PCB from Rev 3.3, the BOM from 3.2 and the Parts from 3.3.1 and now I don't know which version I should follow.
Also I forgot to put the fish paper between the input transformer and the PCB. Is that a big deal?
I hope for quick answers.
Greets from Switzerland