Hardware Kit is easy to assemble and install but requires 2 people. I bought the 9ft version which has 2 x 4.5ft sections. The connection between the two bars is weak and will shift when you lift it. The bars are usually drilled leaving 1 more hole for the lag bolt and gasket than they send you. Additional details are available. This is a powerful mount. This door is 200# solid red oak. Because the cleat holes in this and most other kits on the market are pre-drilled, they are almost never centered on the cleat. Install a good piece of wood for your ledger and you have nothing to worry about. Once it's installed and aligned, the rollers move pretty well. As for the casters, the instructions for drilling holes are confusing. Mark and drill the 1st hole using the 2nd gauge from the center of the 1st hole to the center of the 2nd hole. Only the top opening is actually measured from the top of the door. Measure the track to the center of the bar from the ground.
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