I need arrows. I recently bought a recurve. I want to go with aluminum for now. Might try wood next year. Anyways. I have a few questions. Dumb ones at that.

1.) What is spine.

2.) How much does arrow diameter matter?
2b.) How do I know what diameter to use?

3.) Is it better to go longer or as short as possible with arrow length?

It is a 60" Black Widow with a 63# pull at 30" but I pull a little farther than that if any of that matters.

Thanks