The last three days was first I got a chance to really see how the swat would do real world squirrel hunting. I found I was adjusting the parallax side focus between some shots. You know a squirrel will be 20 yards then next 60. This Atom snaps in and will be great for range finding if needed. However while hunting I was kind of searching for the SF knob. I just went out in the shed and went through my junk box and found this cheap 3d printed 30 mm scope level. It fits on the knob, though screw could be a tad longer. It clears the battery compartment, with no interference. Works great, just tried it , I can easily find it while aiming and makes for fast focusing on target. Something more fancy could be made but think this is going to work for my needs. Now anxious to get it into the woods and see how it is works. Happy Shooting.