Yep without a camera or good memory you can be up sh-- creek. I once rebuilt a rochester 4 barrel sitting on my engine in weather about 30 out and had it half together when my friendly cat jumped up and the parts went every which way. Needless to say, I had to buy some parts I couldn't find. My wife was wondering why I was out at 10:00 at night with a drop cord sitting on my engine. Maybe I was crying