Hi there!
Thanks for all the cool mods in this thread!
I started modding my defender a few weeks back. So far, I have implemented the rear tailgate rubber band tension mod from @Coolusername, the roof rack fog lights, lockable doors and the bar to keep the bonnet open from @twoofive, the door-limiter from @JunkstyleGio.
I have made two mods of my own. One - extremely simple one - is a roof tail light "bar".
The other - is making the passenger seat fold to provide access to the back seat as it would in a real 2-door SUV. For this model - it also gives a better look at more of the gears and axles from the side! The folding mechanism includes a lever "lock" that you must articulate to allow the seat to tip forward. I'm not thrilled with the way the folding mechanism attaches to the seat using studs, but I was unable to find another way to attach it that didn't interfere with the door hinge assembly.
Pictures are below, along with links to download the stud.io files!
Stud.io file for rear light bar
Stud.io file for folding passenger seat