I have made string out of fast flight D-75 450 452 and 8125 I like 8125 for all it true 450 and 452 are a little slower by about 2 to 5 FPS that is nothing you can get that speed back by using a smaller serving like if you use .026 you can go to .025 or a .021 or .018 and the loss of 2 or 5 feet per second in not that big of a deal it mostly in our head Blake