ok . i know this is an old thread but i would like to get a question that's been on my mind. everyone keeps talking about the CG and it being forward of the spar/wing tube . my question is.. when SM is referring to the 25mm CG point being ahead of the spar ,are they meaning 25mm from the front edge of the spar/ wing tube or from the center of the spar/wing tube? my first 8 flights were 15mm in front of the forward edge of the wing tube. if you look at my pic .. 40mm from the centerline of the wing tube would be 25mm a head of the wing spar. . i put mine 15mm from the front edge of the wing tube. too much? mine seems nose heavy meaning i have a little trouble getting the nose to come up on flare.