An adjustable bracket includes a body of quadrilateral shape that defines an attachment plane for a device, which includes a first adjustment mechanism located adjacent a first corner of the quadrilateral shape, a second adjustment mechanism located adjacent a second corner of the quadrilateral shape, and a pivot. The first adjustment mechanism includes a first passage transverse to the attachment plane, a second passage parallel to the attachment plane and leading to the first passage, and a first moveable member extending in the first passage. The second adjustment mechanism includes a third passage transverse to the attachment plane and a fourth passage parallel to the attachment plane, and a second moveable member extending into the third passage. The pivot locates adjacent a fourth corner of the quadrilateral shape such that the first and second adjustment mechanisms are configured for adjusting the adjustable bracket relative to the pivot.