I am not the moderator for this gb, but until the real guys show up I will help. Right, can't have a gb without rules. Ideally you start with a not started kit, however we have two going ,one of which was started 15 years ago and will be getting a bunch of modifications. Another that is over 40 but will be getting a entire go over.
The only real requirement is that the kit you build was molded before 1980. The kits you made as a kid, well......unless your under 30 that is. Get out your Matchbox, Frog and Minicraft kits. Look for the date that old kit in the bottom of your stash was made