Thanks, I'll try the aile test you've suggested.

I guess these servos might work ok but I seem to have one that is malfunctioning, one of the elev servos. when I give down elev and then back to center/neutral, the elev goes down but then doesnt return to center, instead it comes to rest @ 10-15deg up elev. however, If I apply up elev, then it will return to center as it should.

I maidened the plane this weekend and sure enough, the plane kept bobbing up after i gave it down elev. I had to fight it long enough to land the thing but I will def not fly it again until i swap the servos.