[XSPLITTER]

Is there a big difference between 3 and 4 feathers or vanes for indoor shooting ?

 

[buckfeverben]

I don't see any advantage indoors shooting a 4 fletch arrow. Generally a low profile straight fletch is plenty to stabalize indoors. no winds, no broadheads to worry about.

 

[x-cutter]

If you are using stiff, less forgiving, large diameter arrows the more drag the better as long as you are getting clearance. I am personally going to use a four fletch 3" vane on my indoor setup this year and I know in the past that Dee Wilde has shot 4-fletch in the past with great results. You just get a lowere profile with plenty of drag that way and it helps with clearing the cables and riser with the fletching.