The bow is looking great Parnell. Looks like you got a good temper on the belly.
That is good bowstring material. Here is some info I copied and pasted from BCY's website.
BCY-X Bowstring
All the benefits and performance of 452X and 8190 combined. Good for Compound Bows and Recurves. Available in solid colors.
No Creep
Good Arrow Speed
Low fuzziness
High abrasion resistance
Recommended strands: 24 on compound bows
Approximate feet per pound waxed: 9,500
Spool sizes: 1/8 lb., 1/4 lb., or 1 lb.
83% SK90 Dyneema - 17% Vectran - Patented Construction