Looking for a new opener. Current broken one is a chain drive. I see direct screw drives are now available. Are these any good? On a direct drive how do you open and close if the power is out or can you? Chain drive you can disconnect so it can be open/ closed manually. Also with these newer doors do you have to install the door position safety sensors for it to operate or can you install without these sensors?
Not sure how much my door weighs but my current opener is a 1/2 hp. Thinking of stepping up to a 2 hp to ensure no problems opening due to weight.