> Sounds like a good approach when you only have a single (or just a few) of the devices so you need to be careful.

Yes, initially I had just the one. But once I had it figured out there were lots of other people that wanted their device 'improved' so that jig got used plenty of times. Even so working on other people's hardware always felt very scary, especially poking around with a drill in a sensitive piece of hardware. Even so, they all worked, it was a neat little trick.