How to generate a z-offset test print with several height variations.

[skygalleries 0]

Greetings!

 

Recently set up a new printer and had a tough time getting the Z-offset perfect. I was using a BL touch. I was thinking if it does not already exist, how would I go about creating in Cura say  9 squares (3x3) all just a single layer thick, each one would print separately, but set each z height +0.5mm the previous. Then you'd let it print and based on the best square you could adjust your z offset. 

 

My problem right now is I am getting very nice prints, but I can tell by my brim the fist layer is thicker than it should be.

 

So, has anyone come across such an STL or Gcode, or how would I go about creating one? I can create the STL in Fusion  say with a 0.2mm height.  But how can I sett a different z height per square in Cura.

 

Thanks

 

Max