I'm curious how you like your automatic door after 2 months? I read reviews on Amazon. Seems like a lot of people like it at first but have trouble with it not working properly later.
I have 2 automatic chicken doors. One I've had for 3 years. The other I've had for 6 months. Bought both from the same company (
https://www.automaticchickencoopdoor.com). With the first one, I had a problem with the power supply cord. The manufacturer replaced it with no charge. I've also had the string break once for some unknown reason. The string is inside the closed box that contains the motor so it is not exposed. DH was able to fix it rather easily. With BOTH doors I've had problems with the timers not working occasionally. This could be related to them running off of a power strip that is fed by long extension cords. I have replaced the timer for the one I've had the longest a couple of times. Overall the automatic door is an absolute necessity for my coops but they have not been maintenance free and without their own struggles. I've never had any problems with a predator being able to get through to door or open it so it has served its purpose well.
I am currently getting ready to build a 3rd coop and looking at options for another automatic door.