Well... I too have found snaps to be a bit alusive... try this... Expo (Elev and ail)... with more throw in low rate on ails and elev. Initiate the snap with elevator, (box the stick if you must) and as soon as the snap starts, get OFF the elevator.... you are left holding aileron and rudder. Some people will get off the rudder at some point prior to desired termination point of snap, (say... with 1/4 snap remaining) to facilitate snap ending on track. Chip has suggested NO ELEVATOR for snaps.... I have not yet explored this, but I have found doing 2 snaps on a vertical upline with a plane that is High AOA tolerant to be tuff... if they snap good when you want them to, they seem to snap good when you don't want'em to.... at least that has been my experiance.