You may want to read the thread on the PTS, its REAL long and gets repetitive after about page 70 or so, but it is full of good info and mods you need to make before the maiden. BTW, the consensus is to remove the airbrakes altogether or cut them into gear doors and turn them sideways. It has been agreed upon by all they make the plane too slow and too close to stall speed, IE, drop right outta the sky- not something you want to have happen.