71 indeed.
A year or two ago, I finally got a little bit organized and started notebooks for any projects I am working on. I have gotten sick of wondering what color of paint I was using on a particular project, or where the parts came from, or what the reference was. Of course, this would all be moot if I finished a model in the same month I started it, but I don't think that has happened since 1965.
And as for buying duplicates, I don't mind duplicate kits, as anything for 1/72 won't hit the bank account as hard as it would for a 1/32 builder, but ohhh, those decal sheets. I have been driven to multiple decal sheets like a moth to a flame. "Do I already have that one? hmmm - not sure. Better add it to the order".
Rick in Seattle