Yeah I got 2. What I do is raise my DPI on my mouse when cabling cuz the meter goes all over the place when your getting fired upon.
You have to wait till the AT-AT shields are down. Lower the DPI on your mouse and keep the dot in the barrier. Try practicing on the single player missions. You'll get it.
Yeah I have done it in training, but I am never in a snowspeeder when the AT-AT's become vulnerable. Now there is a timer to how long you can hold onto aircraft now so it seems like some luck. I did forget the other day that they have to have their shields down and tried wrapping one up...uber fail lol