Can I attach the power head of this model to the screw-drive assembly of the older SD8000 model (so I don't have to replace the whole thing?)
No, the rail for the SD8000 model will not attach to the Powerlift powerhead.
I have set the travel limits up and down. I noticed one of the STB sensor wires was in the wrong slot. If I unplug the power head from power will I loose the travel limit settings?
No, the limit settings will stay even if the powerhead is unplugged.
What are the motor housing dimensions?
The powerhead dimensions are = 16.8" x 10.0" x 6.9".
can battery back up be added to this model?
No, it cannot.
If the door is open and up, and someone walks through the sensor lights, should the main lights go on automatically?
No, they will not.
I want to buy this model but I need it shipped.
This model is available at The Home Depot, when you purchase it at Homedepot.com it can be shipped to you.
Does it matter which side the red and green sensors are installed
No, it does not matter.
How much does this model cost? Sku: 37411T
For price, please visit The Home Depot site.