When you look at the garage, the garage door itself when opened hangs lower than the center rail itself. So if you want to save the setting for the FWD when the car is in the garage, you'll still need to set it for when the garage door is up. Because not sure how you guys are, but my kids jump out of the car as soon as the car is parked, which means the garage door is up.These. No chains or rails. This unit connects the the tension spring rods. You will still have the doors tracks to deal with though.
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But I've been considering that side mount garage door open just because. lol