Ok...it's me again with the "explain it to me like a 4 year old" question.

Arrows. I see the charts and even they say it's only a guide. There are so many out there and I honestly have some questions about the numbers they're throwing out.

2314- the 23 is actual diameter and the 14 is wall thickness??

There is also a "Spine" # 365, 390, 342...what is THAT?
Stiffer is higher or lower or what? I would think that stiffer would be heavier in GPI, but the Easton chart doesn't follow that.

And now for the grand finale...how do you pick the "perfect arrow" for your setup without buying 73 dozen varieties and finding 2 that fit your rig better than the others?

I'm looking for something that'll cover the indoor spots (which I am not serious about...I still shoot my little MM there) 3d in the summer and still hold up to a shoulder blade come October. Am I dreaming here?

I've shot 2512's, CSX 400, Blackhawk Vapor...and trashed them all rather quickly except the CSX's that shoot like pooh through my setup for some reason. Should I look at the 2315's and just suck up the extra weight?

Thanks for sifting through my confusion guys...