Your airtronics doesn't have expo. Your best bet is to do what Rick said and reduce your elevator throw until the plane just stalls (or snaps). Check your CG in the air by rolling inverted and see how much elevator push it takes to hold level. A lot of push means your nose heavy. Some is good. None is bad.......ad nose weight. Make sure your rudder trim is adjusted as I described above and have fun with it!

CJ