@LovesTha I have noticed a trend among new CAD users in general that is the desire to drive all parameters to a single one they change to create variants of a design. Even if you *can* create relationships between dimensions that all tie back to one of them, is it really worth it? Is the time investment in that worth the “convenience”? It’s perfectly reasonable to use dimensions/constraints efficiently to capture design intent, especially equal size/length.

When I have parts that are pretty similar, but there are variations, I tend towards simply using separate files and saving copies of some base model. I also accept that I might have to edit a few dimensions to adjust the design. I rarely use spreadsheets in FreeCAD because I feel like it’s an unnecessary layer of abstraction when I can just go edit the dimensions directly in sketches/features. I think there is a misconception among new users that dimensions *have* to be driven my spreadsheets or varsets. It is very much not the case.

Besides, how frequently are you going to come back to this design to change it? Are you going to remember the complex relationships you set up in the spreadsheets to make a change? Or, would you rather just go edit the one or two dimensions that need adjusted and move on?

I’m not saying you shouldn’t use spreadsheets to drive your designs, when appropriate. I’m saying that you should resist the urge to add a layer of complexity to a model where it doesn’t make changing it any easier than just directly editing dimensions.