I've used about every size feather, vane configuration you can think of (1956 is when I bought my 1st real bow & joined organized archery). Always with 125 gr. 3 blade fixed the last 45 years. Currently this year is 2 1/2" Razors, 3 fletch & 3" Parobolic, 3 fletch & 3 fletch blazers too. 6 each & all shoot the same (I sight in thru 60 yds but 40 is my personal max hunting). YES, I have used 4 fletch 3" & Blazers & see no differeance or advantage. I used 4" 4 fletch for several years. I use these out of compound 60#s now (used to be 70#s) & also 50# Longbow on occassion. I use the same set up for all my 3-D, Field & Target shooting too. If you have the proper spine & decent tune they will fly like bullets.