
I always wait until I use something more than once before looking at it. how far the shot is I wouldn't trust it on the ground, but it's good for debris buildup and gauging the amount of debris if you keep an eye on the bubble and don't shoot past 200ft. I think the problem is with the 3 bubble adjustment system instead of 4 with lines of ink on the glass to indicate where the bubble should be. This bubble has no markings on the glass to tell you you're in the right place, you have to guess if your bubble is in the middle. These 3 bubbles are stupid. The concept always generates field errors, no matter which path you use. The difference might be a little user error, but mistakes are easy to make on this thing. Anyway I'm pretty sure sending new corrected highs doesn't make our civilian engine sooo happy.