[Bobsama]

Perhaps the issue is more with people with hypermobility syndrome (double-jointedness). It is difficult to put in the necessary pressure using one or two digits; the pictures do help but it would have been a lot more helpful had you shared them about six weeks ago. With short and sturdy ("Asian") hands, it's probably a lot easier. But seriously--there was no way that either I nor my friend could have easily mounted the brackets alone.