Since this is now official, and your first time hosting a GB, couple of things...
You need to change the thread title to "Tamiya WW2 Armor Group Build" or something similar, or start a new thread with the title you want...
You rules are ok, but you also need to start a roster of who and what in order to get a head-count going..
Also, regarding the badge, you need to specify if it goes in the sig-line upon entering or upon completion... I noticed you said to use it on sign-up, but you also need to decide if the person can keep it if he/she doesn't complete the build on time, or has to lose it...
Don't forget to make sure that you check "Email me when someone replies" box.. That way, you'll be notified when you need to update the roster, or answer questions and whatever.. It's easy to get side-tracked and not check on your GB regularly... The emails will remind you..
Enjoy hosting your first "Party"!
BTW, put me in for a TBA... Dunno what I wanna do yet, gotta lot of stuff happening, bench-wise, right now with five or six other GBs... I also wanna see if I have the oldest Tamiya kit in the GB...