This is my first mod, so it probably could be done better.  This mod allows you to buy the 3rd toolkit for calibration from traders in both maps.  No game restart needed.  Feel free to modify the files to make it work better.

Just install to the gamedata folder, and make sure the $game_data$ line in the fsgame.ltx has been changed to 

$game_data$             = true| true|  $fs_root$|            gamedata\


Enjoy!  ChIck3n