Nice little wound you got there. Should heal up well. Your Doc did a great job sewing you back together. Just be careful extending your wrist for a while even after the sutures come out, cause you don't want to rip it open.
First aid kits are invaluble, but you also gotta have the training to use some of the stuff. The idea of the needle and thread is interesting. I wouldn't go sewing up yourself or a buddy if you don't know how to suture. Potential for lots-o-complications. I personally keep a full surgical kit I stole from the Navy in my trauma kit, but I certainly wouldn't try and do a complicated wound repair in the field.
The rest of the list looks great, and there are plenty of web sites that carry a fully made kit.
www.dyna-med.com is one, and you can google a bunch more.
Erik