Hello, The Hang Track allows you to impose more weight onto your wire shelving. It is recommended to install Hang Track when also installing standards. Thank you for your inquiry.
I found that the Rubbermaid brackets did NOT fit on Closet Maid standards. Stick with a single brand. I also found it easier to take out the existing shelve and install a complete hang track system. Faster installation, less compromise, the angle brackets get in the way of useful shelf space. I don't know if that single Rubbermaid shelf could be used on Closet Maid brackets but for the cost of another shelf you will be happier not trying to mix and match.
My pantry is 6 ft wide and have free down supports and approximately 400 pounds worth of canned goods stored on it it is very sturdy
Probably depends on how much weight you put on the shelf. I bought the 80" and using a hacksaw, cut it to size.
No. We do not cut this track in store at the Seymour location.
Lets dad's Mount flush to the wall so you cannot have anything behind the system I guess you can always Notch the shelving around any obstructions but the support brackets must be mounted flush with the wall
They are 4" from the end of the track.