Keeping a "drawing" together

Hello!

I have imported a DXF of an image into my project. My goal is to have the image be a mark on my object that I plan on 3D printing. I would like to be able to have the image remained centred in relationship to my object as I change the size using variables. Is there an “easy” way to do this, or am I going to have to somehow tie each piece of the drawing together just to keep all the lines in place?

In this case, I want to keep the helmet centred between the two circles, even if I change the size of either circle or the distance between the two circles.

As an aside, it seems it is not enough to just create a drawing in my drawing software of choice and export it as a DXF. I struggled to figure out why some files will work and others will not. It seems at least to my limited understanding that I have to make sure the drawing is only using lines, with no fills or any other common vector type thing. If there is documentation suggesting the best method for creating a vector useable for Shapr3D I wouldn’t mind reading it, and if there is not I hope that one day it can be added to the help or tutorials on the Shapr3D website.

Thank you for reading!

Make rectangular slot and center it using constraints. Then extrude helmet on rectangular piece of the same size as in previous step and align it to the slot.

Ok, I think I get what you are saying - I will try that, thank you!