[Elecraft] K2: K60XV application note?

[wrmoore47 at comcast.net]

I'm about to add the K60XV to my K2 #337 and am reviewing the assembly instructions. At the top of p. 16 it says "However, a future application note will explain how to modify the KPA100's 80-meter low-pass filter to work on 80 and 60 meters. This would provide much better rolloff if needed." I can't find this application note. Was it ever created? 

73, 
Randy, KS4L