Reposting because read entire thread. I like the idea of competition. Foam seams safer then the "plastic" FS fins. I love these kinds of rounds and will be using either these or FS much more this summer. I would love an MR 5 set up for these! Alas I will be using a old Talon pistol dremiled out to feed them one at a time..... got it on ebay when I bought a 20oz tank. But I am putting a 10$ red dot and carbon fiber wrap on it!