Jamie88a

For the original cube graphic, if you convert your shapes to curves I think you'll get what you seek.

@Hangman I just had a lot of circles going on with the blue line stroke where I'd placed the curved text which felt unnecessary and caused issues selecting objects that overlapped. Recreating with the knife tool seemed to half it which helps a bit. 

@Jamie88a, you are very welcome, I hope they are helpful...

@Hangman thank you very much for the great tutorials, much appretiated!

Sure, if you're just trying to match an existing graphic, whether as part of a logo or something similar that doesn't adhere to any isometric parameters then maybe something like this just using the rectangle and diamond shape tools with the addition of some skew on the rectangles plus the application of a small corner radius...

Cube.mp4   or if you wanted to go full isometric, then maybe something like this...

Isometric Cube.mp4 FX are a series of built in effects you can add to your graphics, such as 3D, Glows, Overlays, Outlines and Shadows, all found in the FX Panel... For some reason your graphic had an FX Outline applied (evident by the addition of the FX icon in the layers panel adjacent to each layer) though the outline was set to zero so had no actual effect...

The FX applied seem to serve no purpose (unless I've missed something)... the way the shapes have been created is slightly odd too, try the attached...
Scale Box.afdesign
 
Scale.mp4

Thanks Wallt
Untitled.afdesign

I'm sick, i want to kick Illustrator out of my Mac. But without this feature its impossible. I'm praying to Zeus, Batman, Odin, Buda, Michael Jackson, Calvin, Snoopy, for this.  :)