This alternating-frame there are apparently from different manufacturers in an identical design with different manufacturing tolerances and equipment - but the mechanics is all OEMs equally awesome
In the changing context of deleyCON 3.5 no status LED is einebaut - you can see that but only if you look at the picture exactly
Those looking for the same model with status LED, the times should google for "Delock SATA Wechselramen 47191 LED".