[Elecraft] K2 AGC mod information needed

[Don Wilhelm]

  In some time past, someone developed a mod for the K2 AGC which 
allowed all parameters for the threshold and S-meter response to be varied.
The mod used 3 trimpots installed on the Control Board.

I need the documentation for this mod if possible.  I thought I had most 
all the K2 documentation or knew where to find it, but this one escaped.

Help.

73,
Don W3FPR