This is more of a question to those who had the early production AT Pros when they 1st came out. I picked up mine early when they came out and was pretty impressed with it, about a year later it went nuts on me and I had to send it in, when I got it back I seemed to have lost quite a bit of depth. I can still hit targets pretty far down but it seems I have to go a lot slower to hit on those targets. Heard rumors they changed something in the electronics so it would run more stable but at the cost of depth, not sure if this is true or not.