Thanks to both of you. That is now clear - the learning curve from paper and pencil (bad) sketches to MoI is steep.

I presume that If I want a specific sized item tilted, I need to build it square to the three axes and then tilt it. Or is there another way?

Hi wisty, it can be simplest to build it along the world axes and then tilt it but it is also possible to draw it tilted directly. The Rectangle "3pts" command can be good for that:



- Michael

Thanks more for me to experiment with. I have a looooong way to go.