Chamberlain Whisper Drive WD822KD

New install in 5 hours over 2 days, fairly straightforward if you read the install manual ahead of time and purchase the optional items. For my install in 10' ceiling with 7' door, had to get 2 pieces of… 12-gauge angle iron (perforated), four 5/16" bolts, lockwashers, nuts. Also needed to reinforce door; however, simple enough with 18" piece of angle iron as above. Once I started the actual install it went by the book, except that the provided wires for the reverse eye and sensor weren't long enough to go from sensor, up wall, meet in middle, and run along the ceiling to GD Opener. Had to run at more direct angle. Also not sure if those staples are going to hold in drywall over the long run. Point where control wires enter GDO, small orange tabs must be pushed to insert wire and then I had to pull the orange tab back out with needle nose pliers to keep the wires secured. The instructions skip around, for example, you need to reinforce the door before you get to the step of installling the attachment device to connect the curved arm to the lower arm. However, the steps are very well described and point you to the right section for your application. I offer that it's best that Chamberlain doesn't provide a standard hanging bracket because no two applications are the same. The cheap angle iron that came with my unit (probably 18 or 20 gauge) was only 20" and I wouldn't expect that to secure the GDO as well as the angle iron I bought for $2/foot. The best part of the job was that I got to buy a new air tool (cut-off) and make a sound argument for a new workbench with rotating bench vise. My wife liked the new door so much she said I could quit my current job and install GDO full-time ;)

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