Extended Maslow 12 o'clock Level (5 3/4" long)

Extended 40mm over the original for better calibration (Length exaggerates bubble position)

Also, The level bubble I had was 38mm wide, so I extended the bubble slot AND removed the curve so that the edges of slot will hit the edges of the bubble so that you know it's straight.

In my case, I have quite a few steps where I just couldn't tell a difference with the original design, so I made a longer version.