[Javi]

Just as a note, you can scroll the screen to tell you how unlevel you are before you put the legs down.

Personally I've only had the unable to level error two or three times in the past 3 years and almost always it is when the front is too low to start with.

In my experience it's really pretty easy to tell if you're going to be level enough to use the auto level to start with, the auto level screen is your friend if you use it.

Javi