Had a chance to finish up making the "monitor tray pivot bracket end piece jobbers" . after destroying the last one (asleep at the power feed:tired After coming to terms with my mistake i made a new one....
(left and right brackets, a few swipes with an end mill to make them easier on the eyes.....)
This is the side of the tray where the USB (10 pin?) right angle will exit... then into the tube.... and on down to the electronics enclosure. The interesting finish on the parts is whats left of the mill scale (hot rolled.. yuck!) after a trip through the vibratory.... "velvety!!!" (nuts)