Hey Randy: My puter says you're here, but the dang thing lies some. Who makes the carbons you guys sell, and what's the names for the 420 gr and 431 gr? How do those plastic nocks wear, and lastly, how do you change them w/o a threaded hole? i lied, lol, what's the diff in the two aforementioned arrows? Thanks, I searched the 10 pt site and couldn't find the info.