RE: Weighing Arrows - Necessary??
Are these hunting arrows and what distance do you plan on shooting? Frankly your measurements for a complete arrow aren't that bad. I mean, you do handload so you know what 1 grain is. Your arrows vary by what?--4 grains or so? I have weighed vanes from one maufacturer that varied by that much or slightly more. Now you might want to snad and trim or whatever if you are planning on shooting target or field out to 80-100 yards, but if you're going to hunt with them then don't get too techy. Shoot em and have fun.
Numbering arrows is a good practice, too. You never know when you get a bad apple. OK, now we're on a more important issue. How much does the spine vary between these arrows? Clue--------if you don't have a spine-tester then you won't know. And this is much more important than a couple of grains in weight.
Again, shoot em and have fun.