I've only flown the Edmond's Arcie II once on a D12-3. It was flown stock except that I forgot to put on the nose cone fairing that surrounds the receiver and battery. Also, I put small cardboard tubes on the control horns to better engage the servo arms. After the motor pod ejected, the Arcie II glider part went into a steep dive. I could turn left or right slightly, but the dive persisted. The balsa housing for the receiver and battery was broken and missing. I am thinking that the part broke on impact. I'm surprised that the nose cone fairing could make so much difference. I probably can repair this model. I still have the outline of the broken and missing part from the left over laser cutting. The remains are shown in the attached photos.