07 non-FTD Sabre 175 pro/xs. Lots of good info here. I would not plug any holes or add scoops-just asking for problems. I have tried several props, tempest, fury 3 & 4 of different pitches & top speed-25″ Fury 3-running light-very light 70.96. Easiest to drive-24 Fury 4, but only 64. Best all around 24″ Fury 3-3&3/8ths below pad. I would try a 23 or 24 Fury 3-a fresh non worked prop at 3.5″ below pad.