Great job, needed some minor tweaks here and there but all of all a good job.

Needs a few tweaks but a good assembly other than that, as previously mentioned handles are a bit flimsy, and the slots are 90 degree out, but nothing...

Lock box pin to spring link arm, pivot pin is 90 degrees out. 
(Pin needs to compensate for swing in handle rotation.) 
Handle grab too thin, will be ...