Karabiner Switch when KB plugged in

init.lua

local usbWatcher = nil

function usbDeviceCallback(data)
    if (data["productName"] == "Quickfire TKL 6keys") then
        if (data["eventType"] == "added") then
            hs.execute('/Applications/Karabiner.app/Contents/Library/bin/karabiner select 1')
        elseif (data["eventType"] == "removed") then
            hs.execute('/Applications/Karabiner.app/Contents/Library/bin/karabiner select 0')
        end
    end
end

usbWatcher = hs.usb.watcher.new(usbDeviceCallback)
usbWatcher:start()

Using Hammerspoon (http://www.hammerspoon.org/) with the USB watcher ability, add this code to init.lua, update the keyboard name, and set numbers to correct Karabiner profiles.