If you want, just e-mail or call me (662.231.4817) and I'll be glad to help you figure it out.
I'm switching over to B-55, but still have B-500. I prefer the 62XS serving--if you don't know which size, just tell me what type nock you use on your arrows and I'll use the size that gives the best fit. I prefer 2-bundle strings, but can make a 3-bundle if you want. IMO, 3 bundles is just more work, and offer a third color option.
Endless or flemish is basically a personal preferance thing. I like flemish, but either one works just fine.
If I missed anything, just let me know.
Chad