Arrived as scheduled this morning, well packaged w/ a MI decal & can cozy. I re read instructions one more time even after watching the video 4 times. I have OCD. I set everything up on my table and removed the Sparc and proceeded to install the mount w/out the Sparc 2 clicks at a time until the desired tension was reached without wobble. I even backed it off 1 click to be sure and it wobbled, so off once again to increase the tension 1 click. PERFECT. I removed the mount and screwed it to the Sparc. I checked for lower 1/3 and confirmed 100% operating. I'm giving 5 Stars but haven't got to the range yet as I just got it today. I don't anticipate any issues with the MI QDVS what so ever.