[Elecraft] K3 mods timeline

[AC6JA at aol.com]

I was just on Elecraft's website looking at the K3 mods and parts order  
pages.
Is there a list showing which mods were installed in reference by  serial 
number or build dates?
The parts order page only indicates that these mods are "included on all  
new K3's".
I have factory-built serial number #3215 and wanted to bring mine up to  
current build status and want to know which mods I should perform.
Any info would be appreciated.
Thanks.
 
Mike  AC6JA
K3 #3215