Automate Continuity Activation?

I've got an early 2011 MBP with an upgraded AirPort card. I know that one has to jump through kext- and Terminal-based hoops to enable Continuity, but I also know that Continuity Activation Tool does the entire process at the press of a button. I was wondering if it was possible to go even further: Since software updates and OS reinstalls reset the kext, is there a way to make the process of activating Continuity an automatic final step of any OS X software update and/or Yosemite reinstall?

(I always use a bootable Yosemite drive for reinstalls, for what it's worth. I rarely go to the Recovery HD.)