To follow up on the above --
Just after you get your kingpin lock -- I would also photograph it with your cellphone -- while the lock is still within its original packaging.
With these photos -- you can later show your employer the exact make/model kingpin you've been using.
Thus -- they would later also know you bought quality, well-made stuff.
This sort of info would further bolster your defense -- if the need for such should later come to fruition.