Ekimneirbo. As far as the Johnson level, here's the issue I had..... I shimmed one side .020" at a time and kept stacking it until it settled on 1/10 of a degree. I pulled the shims out and when sitting with no shims it still registered 1/10 when it should have been 0. So I recalibrate it. I did exactly the same thing as before but this time the same quantity of shims registered 0. I think I added 3 more shims and it finally hit the 1/10 mark. It made me nervous enough where I knew I couldn't depend on it. I'll let you know how I like the Stabila. I'm not biased and have no loyalty to Stabila so I'll give an honest review.