This is a very good write up..!!
The only thing different that I'm going to do is to disconnect my interior lock toggle on the half doors so you can only lock and unlock them with the key.
My thought behind this is not to make it any more difficult to break in per say, but to make it much more difficult if not impossible to steal the doors. So even with the top and upper door windows off you won't be able to just reach in and unlock the doors without the key.
As far as people wondering about being able to lock them while driving/riding in it.......Really... the're half doors. So I don't see a reason to need to lock them from the inside. (Full doors, different story)
So again, a very good write up sir, well done.