I also like champ Firebird for longest/straightest possible FH roller. However because of its stability and my only moderate experience with the shot, sometimes they cut roll, sometimes they go dead straight, and sometimes they curl over. It's never bad though unless it hits something. I also like an overstable Teebird for a roller that will be guaranteed to curl to the left...I use it to make corners in tricky situations and for rollers that are shorter than the Firebird. I haven't really noticed any advantage for myself going to an overstable Destroyer FH roller vs. the Firebird.