I like your thinking!

Ok so far here's a list of extra parts I've found this far, three extra road wheels, two sprockets, two extra head light guards, two extra I'm assuming Hub assembly's that go behind the sprockets, a large IR spot light, a white light spotlight that looks similar to the ones on the driver side door frame of a police cruiser, some sorta box assembly and a couple smaller parts that are similar to hatches or armor plates with handles or tie downs I'm not sure what they are and a bunch of pad eyes and tie downs.

I meant to take a picture but I had to pack my kit up for the day cause family time is for the weekends and I was only lucky enough to be able to get a few hours of building in this morning.